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. 2012 Apr 12;7(4):e35154. doi: 10.1371/journal.pone.0035154

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Chen et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Acidic and basic residues are shown in red and blue, respectively. Isoelectric points (pIs) were calculated using compute pI/Mw tool (http://web.expasy.org/compute_pi/).