FIG 1.

Multiple-sequence alignment of the first 53 amino acids of the PduB/PduB′ coding region, with their respective translation start sites indicated. The PduB protein has a 37-amino-acid N-terminal extension not present in PduB′ but is otherwise identical in amino acid sequence. Blue-highlighted residues have >80% amino acid sequence identity across the sequences shown, whose GI numbers are (top to bottom) 409994423, 545166260, 737633100, 490278627, 507082779, 506359047, 738157884, 696233319, 746121973, and 496088740.