Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1blxA 1blxB 5gnfA 1blxA 100 0 0 1blxB 72 100 24 5gnfA 52 28 100 FOLD SIMILARITY (Z-SCORE) 1blxA 1blxB 5gnfA 1blxA 49 0 0 1blxB 0 32.1 0 5gnfA 1 0 29.4