FIG 2.

Amino acid sequence alignment of CheZ proteins from A. caulinodans ORS571, E. coli, and S. Typhimurium. The numbers on the left and right show the positions of the residues in E. coli, S. Typhimurium, and A. caulinodans. Gaps indicated by dashes are introduced to maximize the alignments. The similarity between the homologous proteins is highlighted by different shading: black, all amino acids in a column are identical; gray, the amino acids in a column belong to a weak similarity group. The conserved phosphatase active-site motif in E. coli is boxed, and the two key amino residues in the motif, D and Q, are marked with asterisks.