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. 2019 Feb 15;7:70. doi: 10.3389/fchem.2019.00070

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Copyright © 2019 Kulkarni, Habila, Del Borgo and Aguilar.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Chemical structure of β-dodecapeptide, (B) helical net representation of a β-dodecapeptide folded into a 14-helix with the different β³-peptide sequences (C) β-peptide bundle, the homo-octamer of Zwit-1F, (D,E) close-up view of salt-bridging interactions at the (D) anti-parallel and (E) parallel helical interfaces of Zwit-1F, and (F) space-filling model (orange) showing tight packing of β³-homoleucine side-chains in the Zwit-1F core. Adapted with permission from Daniels et al. (2007). Copyright 2007 American Chemical Society.