Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2rb9A 2z1uA 2rb9A 100 89 2z1uA 89 100 FOLD SIMILARITY (Z-SCORE) 2rb9A 2z1uA 2rb9A 56.1 41.7 2z1uA 41.7 59.1