Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1l3aA 3r9zA 1l3aA 100 79 3r9zA 78 100 FOLD SIMILARITY (Z-SCORE) 1l3aA 3r9zA 1l3aA 28.3 18.8 3r9zA 22.4 28.3