Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1mtyD 2yicA 3oy2A 1mtyD 100 100 100 2yicA 100 100 90 3oy2A 100 88 100 FOLD SIMILARITY (Z-SCORE) 1mtyD 2yicA 3oy2A 1mtyD 65.2 2.8 0 2yicA 1.5 73.4 2.6 3oy2A 0 2.3 67.8