FIG. 1.

Amino acid sequence comparisons of SrtA proteins from various gram-positive bacteria. Identical residues which are present in the seven sequences are marked by white letters on a black background. Conserved amino acid residues which are present in five of the seven sequences are written in black on a gray background. The critical cysteyl residue within the catalytic TLXTC motif is indicated with a black arrow. The single letter code is that recommended by IUPAC/IUB. Dots represent gaps introduced into the sequences to ensure optimal homology.