Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3fsyA 3r5dA 3fsyA 100 81 3r5dA 100 100 FOLD SIMILARITY (Z-SCORE) 3fsyA 3r5dA 3fsyA 49.5 35.8 3r5dA 18.5 50.3