Stereoview of 14 converged structures (A) and representative ribbon diagram (B) of MMOB. Restraints are given in Table 1. In A, strictly conserved residues and those with conservative mutations are colored in cyan and purple, respectively. Residues W78 and Y117 are colored orange. Residues 1–30 and 135–141 are excluded, and the backbone of residues 37–44, 48–58, 68–72, 77–82, 85–87, 92–97, 109–113, 115–119, and 122–128 is used for alignment. (B) Ribbon diagram of the structure including terminal regions, the orientations of which are not defined. This figure was made by using molmol (28).