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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Biochim Biophys Acta. 2011 Jun 25;1820(3):417–426. doi: 10.1016/j.bbagen.2011.06.019

Figure 1.

Figure 1

Crystal structures of the apo- (top) and holo-forms (bottom) of human serum transferrin showing details of iron binding: side chains coordinating Fe3+ are colored in red; both ferric ion and the synergistic anion are presented with space-fill models, and are colored by elements (Fe, chocolate red; C, green; and O, red). The PDB accession numbers are 1BTJ (apo-form [65]) and 1A8E (holo-form [66]).