Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2yz2A 3gu3A 2yz2A 100 58 3gu3A 57 100 FOLD SIMILARITY (Z-SCORE) 2yz2A 3gu3A 2yz2A 44.9 0 3gu3A 0 45.2