Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1x8yA 3basA 3basB 1x8yA 100 16 14 3basA 16 100 18 3basB 14 18 100 FOLD SIMILARITY (Z-SCORE) 1x8yA 3basA 3basB 1x8yA 8 6.6 6.4 3basA 6.6 8.2 6.5 3basB 6.4 6.5 8.6