Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2zooA 3ziyA 5tb7A 2zooA 100 91 88 3ziyA 88 100 88 5tb7A 88 88 100 FOLD SIMILARITY (Z-SCORE) 2zooA 3ziyA 5tb7A 2zooA 58.1 49.1 50.2 3ziyA 49.3 64.5 47 5tb7A 50.2 47 55.5