Fig. 2From: Effects of missense mutations in sortase A gene on enzyme activity in Streptococcus mutans Point mutations in mutant enzymes compared with the SrtA enzyme of S. mutans UA159. Detailed legend: SrtA△N40(D56E) contains a single mutation at the 56th amino acid residue, and SrtA△N40(R157H) contains a single mutation at the 157th amino acid residue (labelled in green). The putative catalytic domain of SrtA is shown in redBack to article page