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Thematische Bibliographien / Helical Dichroism / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Helical Dichroism“

Autor: Grafiati

Veröffentlicht am 30. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Oda, Reiko, Peizhao Liu, Yann Battie, et al. "(Invited) Chiral Perovskite Nanocrystals Growth inside Helical Hollowsilica Nanoribbons." ECS Meeting Abstracts MA2023-01, no. 14 (2023): 1344. http://dx.doi.org/10.1149/ma2023-01141344mtgabs.

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Nanometric silica helical ribbons are used as platforms 1) to graft Perovskyte nano crystals and 2) grow in-situ Perovskyte crystals having helical shape using supersaturated recrystallization method. For both systems, they show strong induced circular dichroism (CD) and induced circularly polarized luminescence (CPL) signals, with very high dissymetric g-factors. The signs of these signals depend on the handedness of the helices. Right-handed and left-handed PNCs show respectively positive and negative CD and CPL signals. Simulations based on the boundary element method demonstrate that the c

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2

Xie, Yun Zhi, Chun Hua Liu, Xun Li, Yi Bao Li, and Xiao Lin Fan. "Asymmetry-Induced Supramolecular Helices of Pyrene-Perylene Bisimide Triads." Advanced Materials Research 472-475 (February 2012): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.462.

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The formation of helical nanostructure is investigated for donor/acceptor system. The helices of the supramolecular nanofibres can be revealed by atom force microscope (AFM) and circular dichroism (CD) measurement. The expermental results show the Py-Per-Py can self assembly into helical nanofibres. The controlled experiments on the compound Py-e-Per-e-Py with symmetrical conformation indicates the formation of helical nanofibres may be attributed to asymmetrical conformation.

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3

Miles, A. J., and B. A. Wallace. "Circular dichroism spectroscopy of membrane proteins." Chemical Society Reviews 45, no. 18 (2016): 4859–72. http://dx.doi.org/10.1039/c5cs00084j.

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4

Daly, Steven, Frédéric Rosu, and Valérie Gabelica. "Mass-resolved electronic circular dichroism ion spectroscopy." Science 368, no. 6498 (2020): 1465–68. http://dx.doi.org/10.1126/science.abb1822.

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DNA and proteins are chiral: Their three-dimensional structures cannot be superimposed with their mirror images. Circular dichroism spectroscopy is widely used to characterize chiral compounds, but data interpretation is difficult in the case of mixtures. We recorded the electronic circular dichroism spectra of DNA helices separated in a mass spectrometer. We studied guanine-rich strands having various secondary structures, electrosprayed them as negative ions, irradiated them with an ultraviolet nanosecond optical parametric oscillator laser, and measured the difference in electron photodetac

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5

Liu, Yong, Chao Li, Yaling Liu, and Zhiyong Tang. "Helical silver(I)-glutathione biocoordination polymer nanofibres." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 2000 (2013): 20120307. http://dx.doi.org/10.1098/rsta.2012.0307.

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Helical nanofibres of silver(I)-glutathione (Ag-GSH) biocoordination polymer (BCP) are fabricated by introducing dimethyl sulfoxide into the mixture solution of Ag + ions and l -GSH molecules. The prepared BCP nanofibres show hierarchical helical structures, which are constructed via twisting of small fibres. Water-soluble helices could be further cross-linked with Ca 2+ ions to form a well-dispersed aqueous suspension. When gold nanorods are adsorbed onto these helical nanofibres, the unique plasmon-induced circular dichroism characteristic is observed in the region of the local surface plasm

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6

Lu, S., V. E. Reyes, R. A. Lew, et al. "Role of recurrent hydrophobic residues in catalysis of helix formation by T cell-presented peptides in the presence of lipid vesicles." Journal of Immunology 145, no. 3 (1990): 899–904. http://dx.doi.org/10.4049/jimmunol.145.3.899.

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Abstract We tested the hypothesis that the recurrence of hydrophobic amino acids in a polypeptide at positions falling in an axial, hydrophobic strip if the sequence were coiled as an alpha helix, can lead to helical nucleation on a hydrophobic surface. The hydrophobic surface could anchor such residues, whereas the peptide sequence grows in a helical configuration that is stabilized by hydrogen bonds among carbonyl and amido NH groups along the peptidyl backbone of the helix, and by other intercycle interactions among amino acid side chains. Such bound, helical structures might protect peptid

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7

Kaschke, Johannes, and Martin Wegener. "Optical and Infrared Helical Metamaterials." Nanophotonics 5, no. 4 (2016): 510–23. http://dx.doi.org/10.1515/nanoph-2016-0005.

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AbstractBy tailoring metamaterials with chiral unit cells, giant optical activity and strong circular dichroism have been achieved successfully over the past decade. Metamaterials based on arrays of metal helices have revolutionized the field of chiral metamaterials, because of their capability of exhibiting these pronounced chiro-optical effects over previously unmatched bandwidths. More recently, a large number of new metamaterial designs based on metal helices have been introduced with either optimized optical performance or other chiro-optical properties for novel applications.The fabricat

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8

Ala, Paul, Pele Chong, Vettai S. Ananthanarayanan, Neville Chan, and Daniel S. C. Yang. "Synthesis and characterization of a fragment of an ice nucleation protein." Biochemistry and Cell Biology 71, no. 5-6 (1993): 236–40. http://dx.doi.org/10.1139/o93-036.

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Synthetic peptides were used as models for studying the conformation of ice nucleation proteins. We chemically synthesized four peptides (16-, 24-, 32-, and 48-mer) that consisted of two to six repeats of the consensus repeating octapeptide unit of ice nucleation proteins and evaluated their conformation by circular dichroism spectroscopy. These model peptides exist predominantly as random coils in aqueous solution, but adopt α-helical structures in the presence of trifluoroethanol. The stability of their secondary structures was investigated by monitoring the pH and time dependence of their c

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9

Liang, Kaichang, Lichao Dong, Na Jin, et al. "The synthesis of chiral triphenylpyrrole derivatives and their aggregation-induced emission enhancement, aggregation-induced circular dichroism and helical self-assembly." RSC Advances 6, no. 28 (2016): 23420–27. http://dx.doi.org/10.1039/c5ra26985g.

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10

Kaerkitcha, N., and T. Sagawa. "Amplified polarization properties of electrospun nanofibers containing fluorescent dyes and helical polymer." Photochemical & Photobiological Sciences 17, no. 3 (2018): 342–51. http://dx.doi.org/10.1039/c7pp00413c.

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Well-aligned nanofibers containing cationic fluorescent dyes and anionic chiral polymers prepared via electrospinning exhibit an enhanced circular dichroism, which is mainly caused by linear dichroism and linear birefringence.

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11

Li, Hongkun, Juan Cheng, Yihua Zhao, et al. "l-Valine methyl ester-containing tetraphenylethene: aggregation-induced emission, aggregation-induced circular dichroism, circularly polarized luminescence, and helical self-assembly." Mater. Horiz. 1, no. 5 (2014): 518–21. http://dx.doi.org/10.1039/c4mh00078a.

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12

Xue, Shan, Luming Meng, Rongsen Wen, et al. "Unexpected aggregation induced circular dichroism, circular polarized luminescence and helical assembly from achiral hexaphenylsilole (HPS)." RSC Advances 7, no. 40 (2017): 24841–47. http://dx.doi.org/10.1039/c7ra02495a.

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13

Axelsen, P. H., B. K. Kaufman, R. N. McElhaney, and R. N. Lewis. "The infrared dichroism of transmembrane helical polypeptides." Biophysical Journal 69, no. 6 (1995): 2770–81. http://dx.doi.org/10.1016/s0006-3495(95)80150-5.

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14

Rabenold, David A. "Circular dichroism band shapes for helical polymers." Journal of Physical Chemistry 92, no. 17 (1988): 4863–68. http://dx.doi.org/10.1021/j100328a013.

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15

Kodaka, Masato. "Circular dichroism induced by helical host molecules." Journal of the Chemical Society, Faraday Transactions 93, no. 11 (1997): 2057–59. http://dx.doi.org/10.1039/a700222j.

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16

Brullot, Ward, Maarten K. Vanbel, Tom Swusten, and Thierry Verbiest. "Resolving enantiomers using the optical angular momentum of twisted light." Science Advances 2, no. 3 (2016): e1501349. http://dx.doi.org/10.1126/sciadv.1501349.

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Circular dichroism and optical rotation are crucial for the characterization of chiral molecules and are of importance to the study of pharmaceutical drugs, proteins, DNA, and many others. These techniques are based on the different interactions of enantiomers with circularly polarized components of plane wave light that carries spin angular momentum (SAM). For light carrying orbital angular momentum (OAM), for example, twisted or helical light, the consensus is that it cannot engage with the chirality of a molecular system as previous studies failed to demonstrate an interaction between optic

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17

Wang, Heng, Adriana Pietropaolo, Wenbin Wang, et al. "Right-handed 2/1 helical arrangement of benzene molecules in cholic acid crystal established by experimental and theoretical circular dichroism spectroscopy." RSC Advances 5, no. 122 (2015): 101110–14. http://dx.doi.org/10.1039/c5ra20853j.

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18

Kefala, Aikaterini, Maria Amprazi, Efstratios Mylonas та ін. "Probing Protein Folding with Sequence-Reversed α-Helical Bundles". International Journal of Molecular Sciences 22, № 4 (2021): 1955. http://dx.doi.org/10.3390/ijms22041955.

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Recurrent protein folding motifs include various types of helical bundles formed by α-helices that supercoil around each other. While specific patterns of amino acid residues (heptad repeats) characterize the highly versatile folding motif of four-α-helical bundles, the significance of the polypeptide chain directionality is not sufficiently understood, although it determines sequence patterns, helical dipoles, and other parameters for the folding and oligomerization processes of bundles. To investigate directionality aspects in sequence-structure relationships, we reversed the amino acid sequ

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19

Shanmugam, Ganesh, Prasad L. Polavarapu, Amy Kendall, and Gerald Stubbs. "Structures of plant viruses from vibrational circular dichroism." Journal of General Virology 86, no. 8 (2005): 2371–77. http://dx.doi.org/10.1099/vir.0.81055-0.

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Vibrational circular dichroism (VCD) spectra in the amide I and II regions have been measured for viruses for the first time. VCD spectra were recorded for films prepared from aqueous buffer solutions and also for solutions using D2O buffers at pH 8. Investigations of four filamentous plant viruses, Tobacco mosaic virus (TMV), Papaya mosaic virus, Narcissus mosaic virus (NMV) and Potato virus X (PVX), as well as a deletion mutant of PVX, are described in this paper. The film VCD spectra of the viruses clearly revealed helical structures in the virus coat proteins; the nucleic acid bases presen

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20

Zhao, Chunhui, Kunbing Ouyang, Jin Zhang, and Nianfa Yang. "Synthesis and properties of optically active helical polymers from (S)-3-functional-3′-vinyl-BINOL derivatives." RSC Advances 6, no. 47 (2016): 41103–7. http://dx.doi.org/10.1039/c6ra08146k.

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Helical vinyl polymers bearing N-heterocycles substituent BINOL derivatives were synthesized. The specific optical rotation and circular dichroism spectra data show the obtained polymers can keep a prevailing helicity of backbone in solution.

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21

Botek, Edith, and Benoît Champagne. "Circular dichroism of helical structures using semiempirical methods." Journal of Chemical Physics 127, no. 20 (2007): 204101. http://dx.doi.org/10.1063/1.2805395.

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22

Rabenold, David A., and William Rhodes. ".alpha.-Helical polypeptide circular dichroism component band analysis." Journal of Physical Chemistry 90, no. 12 (1986): 2560–66. http://dx.doi.org/10.1021/j100403a004.

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23

Miyahara, Shin, and Nobuo Furukawa. "Nonreciprocal Directional Dichroism and Toroidalmagnons in Helical Magnets." Journal of the Physical Society of Japan 81, no. 2 (2012): 023712. http://dx.doi.org/10.1143/jpsj.81.023712.

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24

Stevenson, Warren D., Xiangbing Zeng, Chris Welch, Anil K. Thakur, Goran Ungar, and Georg H. Mehl. "Macroscopic chirality of twist-bend nematic phase in bent dimers confirmed by circular dichroism." Journal of Materials Chemistry C 8, no. 3 (2020): 1041–47. http://dx.doi.org/10.1039/c9tc05061b.

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Long-range global chirality is confirmed in the twist-bend nematic phase of bent dimers using circular dichroism spectroscopy. The phase absorbs left and right circularly polarized light differently, confirming its helical rather than wavy character.

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25

De Rosa, Lucia, Donatella Diana, Domenica Capasso, et al. "Switching the N-Capping Region from all-L to all-D Amino Acids in a VEGF Mimetic Helical Peptide." Molecules 27, no. 20 (2022): 6982. http://dx.doi.org/10.3390/molecules27206982.

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The N-capping region of an α-helix is a short N-terminal amino acid stretch that contributes to nucleate and stabilize the helical structure. In the VEGF mimetic helical peptide QK, the N-capping region was previously demonstrated to be a key factor of QK helical folding. In this paper, we explored the effect of the chiral inversion of the N-capping sequence on QK folding, performing conformational analysis in solution by circular dichroism and NMR spectroscopy. The effect of such a modification on QK stability in serum and the proliferative effect were also evaluated.

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26

Zheng, Xiu-Ying, Han Zhang, Ling-Yun Cao, Xiang-Jian Kong, La-Sheng Long, and Lan-Sun Zheng. "Chirality detection of two enantiomorphic 3D lanthanide coordination polymers by vibrational circular dichroism spectra." Dalton Transactions 44, no. 12 (2015): 5299–302. http://dx.doi.org/10.1039/c5dt00404g.

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Two enantiomorphic 3D lanthanide coordination polymers with chiral helical chains were synthesized based on an achiral ligand. The absolute configurations of the two structures were evidenced by the observation of strong signals in vibrational circular dichroism (VCD) spectra.

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27

Wang, Lei, and Luogen Deng. "Plasmonic Circular Dichroism of the Helical Nanosphere Assemblies and the Helical Nanoellipsoid Assemblies." Plasmonics 10, no. 2 (2014): 399–409. http://dx.doi.org/10.1007/s11468-014-9821-1.

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28

Perumal, Pandurangan, and Vijaya P. Pandey. "Antimicrobial peptides: the role of hydrophobicity in the alpha helical structure." Journal of Pharmacy & Pharmacognosy Research 1, no. 1 (2013): 39–53. http://dx.doi.org/10.56499/jppres13.005_1.2.39.

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The antimicrobial peptides (AMPs) are a class of molecule obtained from plants, insects, animals, and humans. These peptides have been classified into five categories: 1. Anionic peptide, 2. Linear alpha helical cationic peptide, 3. Cationic peptide, 4. Anionic and cationic peptides with disulphide bonds, and 5. Anionic and cationic peptide fragments of larger proteins. Factors affecting AMPs are sequence, size, charge, hydrophobicity, amphipathicity, structure and conformation. Synthesis of these peptides is convenient by using solid phase peptide synthesis by using FMOC chemistry protocol. T

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29

Yang, Jinhong, Na Sun, Xuelai Xie, et al. "Structure Characterization and Mechanical Properties of Acidity-Induced Helix of Alginate and Fibers." Materials 18, no. 11 (2025): 2619. https://doi.org/10.3390/ma18112619.

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The brittleness of alginate fibers has limited their biological applications. Enhancing fiber toughness without sacrificing fracture tensile strength is challenging. Herein, an acidity-triggered helical conformational change in alginate is demonstrated to improve fiber toughness. During fiber formation by Ca2+ crosslinking, HCl triggers 21-helical and antiparallel twofold helical conformational changes in sodium alginate. The helical structures were confirmed using circular dichroism and X-ray diffraction. Rheological analysis revealed that the helical conformation was flexible and could exten

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Pan, Ziheng, and Wei Zheng. "Synthesis Amphiphilic One-Handed Helical Ladder Polymers with Circularly Polarized Luminescence." Molecules 30, no. 12 (2025): 2606. https://doi.org/10.3390/molecules30122606.

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Helical ladder polymers attract attention because of their well-defined, one-handed helical ladder structures and unique properties, which differ from precursor polymers that have random-coil conformations. However, the synthesis of helical ladder polymers is difficult and inhibits their functions and applications. In this study, we reported the synthesis of amphiphilic optically active 2,2′-tethered binaphthyl-embedded helical ladder polymers carrying hydrophilic oligo (ethylene glycol) (OEG) as side chains through quantitative and chemoselective acid-promoted intramolecular cyclization of ra

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31

Chen, Jing, Songmei Li, Juan Du, et al. "Optically active multi-helical erythrocyte-like Ln(OH)CO3 (Ln = La, Ce, Pr and Sm)." Physical Chemistry Chemical Physics 18, no. 30 (2016): 20261–65. http://dx.doi.org/10.1039/c6cp02302a.

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Hierarchical erythrocyte-like Ln(OH)CO<sub>3</sub> with nanosized chiral structure-induced circular dichroism responses, assigned to valence to conduction band transitions and coupling effects between the left-handed-assembled Ln(OH)CO<sub>3</sub> nanorods in the multi-helical RBC-like architecture.

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32

Saxena, Sarika, Satoru Nagatoishi, Daisuke Miyoshi, and Naoki Sugimoto. "Structural and Functional Characterization of RecG Helicase under Dilute and Molecular Crowding Conditions." Journal of Nucleic Acids 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/392039.

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In an ATP-dependent reaction, theEscherichia coliRecG helicase unwinds DNA junctionsin vitro. We present evidence of a unique protein conformational change in the RecG helicase from anα-helix to aβ-strand upon an ATP binding under dilute conditions using circular dichroism (CD) spectroscopy. In contrast, under molecular crowding conditions, theα-helical conformation was stable even upon an ATP binding. These distinct conformational behaviors were observed to be independent of Na+and Mg2+. Interestingly, CD measurements demonstrated that the spectra of a frayed duplex decreased with increasing

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Lees, J. G., and B. A. Wallace. "Synchrotron radiation circular dichroism and conventional circular dichroism spectroscopy: A comparison." Spectroscopy 16, no. 3-4 (2002): 121–25. http://dx.doi.org/10.1155/2002/280646.

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Conventional circular dichroism (cCD) spectroscopy is a valuable tool for secondary structure analyses of proteins. In recent years, it has been possible to use synchrotrons as light sources for CD, with the technique being known as Synchrotron Radiation Circular Dichroism (SRCD). In this study, the spectra of two proteins, the primarily helical myoglobin and the primarily beta‒sheet concanavalin A, have been collected on both a cCD instrument and on the SRCD at the Daresbury synchrotron and their characteristics were compared. Over the wavelength regions where both instruments are capable of

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34

Christofi, Aristi, and Nikolaos Stefanou. "Strong magnetochiral dichroism of helical structures of garnet particles." Optics Letters 38, no. 22 (2013): 4629. http://dx.doi.org/10.1364/ol.38.004629.

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35

Baimuratov, Anvar S., Tatiana P. Pereziabova, Nikita V. Tepliakov, et al. "Electric-field-enhanced circular dichroism of helical semiconductor nanoribbons." Optics Letters 44, no. 3 (2019): 499. http://dx.doi.org/10.1364/ol.44.000499.

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36

Song, Chengyi, Martin G. Blaber, Gongpu Zhao, et al. "Tailorable Plasmonic Circular Dichroism Properties of Helical Nanoparticle Superstructures." Nano Letters 13, no. 7 (2013): 3256–61. http://dx.doi.org/10.1021/nl4013776.

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37

Rabenold, David A. "Circular dichroism of helical polymers: a short-wavelength formulation." Journal of Physical Chemistry 94, no. 16 (1990): 6171–75. http://dx.doi.org/10.1021/j100379a007.

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38

Tobata, H., and T. Sagawa. "Specific excitonic interactions in the aggregates of hyaluronic acid and cyanine dyes with different lengths of methine group." Photochemical & Photobiological Sciences 15, no. 3 (2016): 329–33. http://dx.doi.org/10.1039/c5pp00343a.

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The absorption and circular dichroism (CD) spectra of three types of cyanine dyes with different lengths of methine group (3,3′-diethylthiadicarbocyanine iodide, DTDC; 3,3′-diethylthiacarbocyanine iodide, DTC; and 3,3′-diethylthiacyanine iodide, DTTHC) in an aqueous solution were compared with and without hyaluronic acid (HA), which has a helical structure.

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39

GÖKOĞLU, GÖKHAN, and TARIK ÇELİK. "ALPHA-HELIX FORMATION IN C-PEPTIDE RNASE-A INVESTIGATED BY PARALLEL TEMPERING SIMULATIONS." International Journal of Modern Physics C 18, no. 01 (2007): 91–98. http://dx.doi.org/10.1142/s0129183107010292.

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We have performed parallel tempering simulations of a 13-residue peptide fragment of ribonuclease-A, c-peptide, in implicit solvent with constant dielectric permittivity. This peptide has a strong tendency to form α-helical conformations in solvent as suggested by circular dichroism (CD) and nuclear magnetic resonance (NMR) experiments. Our results demonstrate that 5th and 8–12 residues are in the α-helical region of the Ramachandran map for global minimum energy state in solvent environment. Effects of salt bridge formation on stability of α-helix structure are discussed.

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40

Jarpe, M. A., and H. M. Johnson. "Topology of receptor binding domains of mouse IFN-gamma." Journal of Immunology 145, no. 10 (1990): 3304–9. http://dx.doi.org/10.4049/jimmunol.145.10.3304.

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Abstract IFN-gamma is an essential immunoregulatory lymphokine for a variety of immunologic functions including upregulation of MHC Ag. The elucidation of the structure, particularly the receptor binding domains, should further enhance our understanding of its mechanism of action, and provide a rational basis for modulation of its activity by alteration of its structure. A predicted model of murine IFN-gamma structure has been constructed based on data derived from our synthetic peptide studies, circular dichroism spectra, and predictive algorithms for secondary structure, surface accessibilit

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de Cuevas, M., T. Tao, and L. S. Goldstein. "Evidence that the stalk of Drosophila kinesin heavy chain is an alpha-helical coiled coil." Journal of Cell Biology 116, no. 4 (1992): 957–65. http://dx.doi.org/10.1083/jcb.116.4.957.

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Kinesin is a mechanochemical enzyme composed of three distinct domains: a globular head domain, a rodlike stalk domain, and a small globular tail domain. The stalk domain has sequence features characteristic of alpha-helical coiled coils. To gain insight into the structure of the kinesin stalk, we expressed it from a segment of the Drosophila melanogaster kinesin heavy chain gene and purified it from Escherichia coli. When observed by EM, this protein formed a rodlike structure 40-55 nm long that was occasionally bent at a hingelike region near the middle of the molecule. An additional EM stud

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42

SUDHA, T. S., E. K. S. VIJAYAKUMAR та P. BALARAM. "Circular dichroism studies of helical oligopeptides: Can 310 and α-helical conformations be chiroptically distinguished?" International Journal of Peptide and Protein Research 22, № 4 (2009): 464–68. http://dx.doi.org/10.1111/j.1399-3011.1983.tb02116.x.

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43

Kim, Ju-Yong, Jae-Jin Lee, and Suk-Won Choi. "Chiroptical Characteristics of Nanosegregated Phases in Binary Mixture Consisting of Achiral Bent-Core Molecule and Bent-Core Base Main-Chain Polymer." Polymers 14, no. 14 (2022): 2823. http://dx.doi.org/10.3390/polym14142823.

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In this paper, a binary mixture system consisting of an achiral bent-core molecule and a bent-core base main-chain polymer is described. The mixture exhibits an intriguing nanosegregated phase generated by the phase separation of the helical nanofilament B4 phase (originating from the bent-core molecule) and the dark conglomerate phase (originating from the bent-core base main-chain polymer). This nanosegregated phase was identified using polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction analysis. In this nanosegregated phase, the enantiomeric domains grew

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Zhang Wentao, 张文涛, 施维捷 Shi Weijie, 郭慧 Guo Hui та 闫长春 Yan Changchun. "旋转螺旋型中红外手性超材料的宽带圆二向色性". Laser & Optoelectronics Progress 59, № 5 (2022): 0516002. http://dx.doi.org/10.3788/lop202259.0516002.

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Jones, Christopher T., Lixin Ma, John W. Burgner, Teresa D. Groesch, Carol B. Post, and Richard J. Kuhn. "Flavivirus Capsid Is a Dimeric Alpha-Helical Protein." Journal of Virology 77, no. 12 (2003): 7143–49. http://dx.doi.org/10.1128/jvi.77.12.7143-7149.2003.

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ABSTRACT The capsid proteins of two flaviviruses, yellow fever virus and dengue virus, were expressed in Escherichia coli and purified to near homogeneity suitable for biochemical characterization and structure determination by nuclear magnetic resonance. The oligomeric properties of the capsid protein in solution were investigated. In the absence of nucleic acid, both proteins were predominately dimeric in solution. Further analysis of both proteins with far-UV circular dichroism spectroscopy indicated that they were largely alpha-helical. The secondary structure elements of the dengue virus

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Lee, Jae-Jin, and Suk-Won Choi. "Effect of Nematogen Doping in Bent-Core Molecular Systems with a Helical Nanofilament and Dark Conglomerate." Materials 16, no. 2 (2023): 548. http://dx.doi.org/10.3390/ma16020548.

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Two types of binary mixtures were prepared. One consisted of a calamitic nematogen and bent-core molecule with a helical nanofilament, whereas the other contained a calamitic nematogen and bent-core molecule with a dark conglomerate. The chiroptical features of these two mixtures were investigated using polarized optical microscopy and circular dichroism. In addition, X-ray diffraction analysis was performed on the two binary mixtures. The chiroptical features of the two mixtures were remarkably different. One mixture showed enhanced chiroptical features, whereas the other did not show chiropt

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Müller, Dirk, Marc Böhme, Martin Nieger, Kari Rissanen, and Fritz Vögtle. "Helical thiaza[2.2]metacyclophanes. Synthesis, structure, circular dichroism, absolute configuration." J. Chem. Soc., Perkin Trans. 1, no. 24 (1996): 2937–43. http://dx.doi.org/10.1039/p19960002937.

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Hu, Jingpei, Xiaonan Zhao, Ruibin Li, et al. "Broadband circularly polarizing dichroism with high efficient plasmonic helical surface." Optics Express 24, no. 10 (2016): 11023. http://dx.doi.org/10.1364/oe.24.011023.

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Doig, Andrew J., Charles D. Andrew, Duncan A. E. Cochran та ін. "Structure, stability and folding of the α-helix". Biochemical Society Symposia 68 (1 серпня 2001): 95–110. http://dx.doi.org/10.1042/bss0680095.

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Pauling first described the α-helix nearly 50 years ago, yet new features of its structure continue to be discovered, using peptide model systems, site-directed mutagenesis, advances in theory, the expansion of the Protein Data Bank and new experimental techniques. Helical peptides in solution form a vast number of structures, including fully helical, fully coiled and partly helical. To interpret peptide results quantitatively it is essential to use a helix/coil model that includes the stabilities of all these conformations. Our models now include terms for helix interiors, capping, side-chain

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Koenis, Mark A. J., Valentin P. Nicu, Lucas Visscher, et al. "Vibrational circular dichroism studies of exceptionally strong chirality inducers in liquid crystals." Physical Chemistry Chemical Physics 23, no. 16 (2021): 10021–28. http://dx.doi.org/10.1039/d1cp00854d.

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Chiral dopants are used in liquid crystal displays to introduce uniform helical alignment. VCD can provide unambiguous determination of the absolute configuration and structural details of such a dopant, while X-ray crystallography fails.

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