Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2rihA 4fryA 4fryB 2rihA 100 84 84 4fryA 54 100 99 4fryB 54 99 100 FOLD SIMILARITY (Z-SCORE) 2rihA 4fryA 4fryB 2rihA 28.4 5.8 5.7 4fryA 16 27.6 25.8 4fryB 15.7 25.8 27.6