Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3hfdA 4rzyA 6dkhA 3hfdA 100 67 45 4rzyA 65 100 88 6dkhA 46 90 100 FOLD SIMILARITY (Z-SCORE) 3hfdA 4rzyA 6dkhA 3hfdA 32.5 0 0 4rzyA 0 66.4 0 6dkhA 0 1.6 61.5