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PR monomers. (A) Ribbon diagram of the final data set superposed by least squares. (B) Putty cartoon of B-factor variation on the mean structure, colored from low to high (yellow to red). (C) putty cartoon of spatial variation on the mean structure, colored from low to high (blue to green). Refer to figure 1 for definitions of PR regions. Rendered using PyMOL (DeLano, 2002)
