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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: J Inorg Biochem. 2011 Jan;105(1):39–45. doi: 10.1016/j.jinorgbio.2010.09.005

Fig. 6.

Fig. 6

Visible region of the CD spectrum of apotransferrin incubated with complex 1. Bands associated with d-d transitions are observed after 2, 4, 7 and 10 eq of the drug (A). Aromatic region of the CD spectrum of apotransferrin after incubation with 2, 4, 7 and 10 eq of complex 1 (B). After a 10-fold excess of metal complex was added, the transferrin did not seem to be saturated. Assuming that a high percentage of the drug added binds to the protein, this observation suggests that the Ru(II)-CQ compounds bind at more binding sites than the two specific ones for iron(III).