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. Author manuscript; available in PMC: 2008 Jun 20.
Published in final edited form as: J Am Chem Soc. 2008 May 28;130(24):7592–7606. doi: 10.1021/ja710067d

Figure 3.

Figure 3

Electronic Spectroscopy of Ni or Co-substituted RcnR. (A) UV-visible difference spectra of 1:1 Ni(II)-RcnR (60 μM) (orange line) and 1:1 Co(II)-RcnR (85 μM) (blue line) were obtained in Buffer M. A metal-free sample was subtracted to obtain the difference spectrum. Data were collected every 0.5 nm. (B) Stoichiometric addition of NiCl2 to RcnR (60 μM). (C) Stoichiometric addition of CoCl2 to RcnR (88 μM). The absorbance signal saturated at 1.0 Co/monomer and 1.2 Ni/monomer under the same solution conditions as in (A).