Figure 3
From: The BsaHI restriction-modification system: Cloning, sequencing and analysis of conserved motifs
Alignment of Conserved Motifs Found in the PD-(D/E)xK Superfamily. Multiple sequence alignments of R. BsaHI with restriction enzymes known to belong to the PD-(D/E)xK superfamily. The 'R-box' motif and region from the proposed catalytic ExK motif of R. BsaHI to the conserved hydrophobic β-sheet (L(153)VI), that forms part of the structural core of the enzyme, are shown.