Co(II) Coordination in Prokaryotic Zinc Finger Domains as Revealed by UV-Vis Spectroscopy

Figure 3

(a) Scheme of the UV-Vis spectra in the 500–800 nm range for Co(II) tetrahedral coordination by different ZFs: four Cys (green line), three Cys and one His (blue line), and two Cys and two His (red line) [37, 49]. (b) Introducing the single-cysteine coordination sphere in the scheme (violet line). The shape of the transition pattern is extremely sensitive to the structure [50].