FIGURE 5.

Saturation recovery curves for R1 attached to residues 131 (A) and 133 (B). Curves were recorded under an argon atmosphere (Ar), in the presence of oxygen in equilibrium with air (O2), and in the presence of 3 mM NiEDDA (Ni).

Saturation recovery curves for R1 attached to residues 131 (A) and 133 (B). Curves were recorded under an argon atmosphere (Ar), in the presence of oxygen in equilibrium with air (O2), and in the presence of 3 mM NiEDDA (Ni).