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. 2014 Jul 24;4(3):725–773. doi: 10.3390/biom4030725

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© 2014 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Ramachandran plots for cationic AAA (upper panel) and zwitterionic AAA (middle panel) and AdP (lower panel) obtained by MD simulations using the OPLS force field and SPC/E water model. (Taken from ref. [15] with permission).