Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1exbE 2r9rB 1exbE 100 97 2r9rB 97 100 FOLD SIMILARITY (Z-SCORE) 1exbE 2r9rB 1exbE 21.8 19.2 2r9rB 19.2 42.4