Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2hzaA 2hzaB 3edpA 2hzaA 100 94 10 2hzaB 94 100 87 3edpA 0 88 100 FOLD SIMILARITY (Z-SCORE) 2hzaA 2hzaB 3edpA 2hzaA 22.1 17.6 0.5 2hzaB 17.6 20.3 0.6 3edpA 0.4 0.5 35.9