Figure 3 - full size

Figure 3.
FIG. 3. The active site of IIB^Mtl. A, stereo view of the active site with the backbone in light blue, side chains in red, Cys-384 in orange, and the backbone NH bonds in dark blue with the H[N] protons represented by small spheres. B, possible mechanism of phosphoryl transfer from IIA^Mtl to IIB^Mtl. Single-letter amino acid abbreviations are used with position numbers.