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Solid-State NMR results on 13C-Ala/Ser and 13C-Val enriched Argiope argentata prey-wrapping silk show that native, freshly spun aciniform silk nanofibers are dominated by α-helical (∼50% total) and random-coil (∼35% total) secondary structures, with minor β-sheet nanocrystalline domains (∼15% total). This is the most in-depth study to date characterizing the protein structural conformation of the toughest natural biopolymer: aciniform prey-wrapping silks.
B. Addison, D. Onofrei, D. Stengel, B. Blass, B. Brenneman, J. Ayon and G. P. Holland, Chem. Commun., 2018, 54, 10746 DOI: 10.1039/C8CC05246H
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