Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2o38A 2o38B 3fpwA 2o38A 100 99 16 2o38B 99 100 16 3fpwA 6 5 100 FOLD SIMILARITY (Z-SCORE) 2o38A 2o38B 3fpwA 2o38A 19.2 17.2 0.2 2o38B 17.2 19.4 0.1 3fpwA 0.1 0.2 30.8