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. 2012 Oct 8;7(10):e45379. doi: 10.1371/journal.pone.0045379

Figure 2. Definition of distance reference system.

Figure 2

A: Protein center of mass aligned to coordinate origin (z-axis is offset to left for clarity). B: Protein structure offset by z-min. C: Definition of distance of discrete charge, Inline graphic, to NW surface.