Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2yz2B 3c1qA 3c1qB 2yz2B 100 0 0 3c1qA 6 100 95 3c1qB 0 95 100 FOLD SIMILARITY (Z-SCORE) 2yz2B 3c1qA 3c1qB 2yz2B 44.8 0 0 3c1qA 0 25.8 21.8 3c1qB 0.1 21.8 25