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. 2013 Aug 5;8(8):e70880. doi: 10.1371/journal.pone.0070880

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© 2013 Gesteira 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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Black, NST; green, NSTLys614Ala; blue, NSTHis716Ala; red, NSTLys833Ala. A, N-sulfotransferase domain (NST) alone; B, NST-PAPS systems; C, NST-PAPS-GlcN-GlcA; D, NST-PAP-GlcNS-GlcA.