Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4oc9A 5tsuA 4oc9A 100 89 5tsuA 88 100 FOLD SIMILARITY (Z-SCORE) 4oc9A 5tsuA 4oc9A 75.9 52.7 5tsuA 52.8 71.6