Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2iubA 3klyA 3klyB 3klyC 2iubA 100 100 100 65 3klyA 67 100 99 98 3klyB 64 99 100 99 3klyC 64 98 99 100 FOLD SIMILARITY (Z-SCORE) 2iubA 3klyA 3klyB 3klyC 2iubA 46.3 0.7 0.7 0 3klyA 0 46.3 41.2 42 3klyB 0 41.2 45.7 41 3klyC 0 42 41 46.1