Figure 9.
Low-temperature X-band CW EPR spectra of CP-Ser (200 μM) incubated with 0.9 equivalents of Mn(II) at pH 5.5–7.0 (75 mM MES, 100 mM NaCl) in the presence (A) and absence (B) of 2 mM Ca(II). An EPR spectrum of Mn(II) (180 μM) in MES buffer (75 mM MES, 100 mM NaCl, pH 5.5) is provided for comparison (panel B).