Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4a6rA 4ysnA 5m49A 4a6rA 100 87 87 4ysnA 87 100 87 5m49A 86 87 100 FOLD SIMILARITY (Z-SCORE) 4a6rA 4ysnA 5m49A 4a6rA 72 46.2 42.1 4ysnA 46.2 73.2 51.6 5m49A 42.1 51.5 72.6