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. 2011 Dec 17;287(11):8039–8047. doi: 10.1074/jbc.M111.296574

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© 2012 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 3. — Interstrand, intrastrand, and interhelical interactions in KGD. a and b, interstrand hydrogen bonds involving the charged side chains. c, intrastrand hydrogen bond. d, top view of packing interactions involving the residues depicted in b and c. Triple helices oriented N to C terminus in Fig. 1 are shown in gray (A, leading chain; B, middle chain; C, lagging chain), and triple helices oriented C to N terminus in Fig. 1 are depicted in black (D, leading chain; E, middle chain; F, lagging chain). Lysines are shown in cyan and aspartates in purple. Amino acids are labeled using their three-letter code, sequence position, and chain. Images were generated using PyMOL (21).