Table 1.

Intein conserved motifs

The sequence of each motif is listed with the intein class 3 signature positions marked by an asterisk. The slash denotes each splice junction. The position number within each block of selected catalytically important amino acids is listed. The class 3 specific BI^F branch point (F:4) is shaded gray and the BI^G branch point common to all inteins (G:8 or +1) is underlined