Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2zigA 2zigB 3c3vA 2zigA 100 98 0 2zigB 98 100 0 3c3vA 61 64 100 FOLD SIMILARITY (Z-SCORE) 2zigA 2zigB 3c3vA 2zigA 42.9 38.3 0 2zigB 38.3 43.3 0 3c3vA 0 0 67.5