Figure 2.

Amino acid alignment of Sla (streptococcal phospholipase A2 homologue) and textilotoxin subunits. The carboxy terminal 116 amino acid residues of Sla were aligned with the four subunits of textilotoxin with clustalw, using default parameters. Amino acid residues that match the consensus sequence are shaded in dark gray, and similar amino acid residues are shaded in light gray. The textilotoxin phospholipase A2 active site consensus sequence is shown in red, and conserved Cys residues are underlined.