Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3c3yA 5b5vA 3c3yA 100 45 5b5vA 49 100 FOLD SIMILARITY (Z-SCORE) 3c3yA 5b5vA 3c3yA 43.8 0 5b5vA 0 35.6