Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1zw2A 1zw2B 4dj9A 4dj9B 4e18A 4e18B 1zw2A 100 0 96 0 95 0 1zw2B 0 0 0 0 0 0 4dj9A 0 0 0 0 0 0 4dj9B 0 0 0 0 0 0 4e18A 0 0 0 0 0 0 4e18B 0 0 0 0 0 0 FOLD SIMILARITY (Z-SCORE) 1zw2A 1zw2B 4dj9A 4dj9B 4e18A 4e18B 1zw2A 34 0 28.2 0 17.6 0 1zw2B 0 0 0 0 0 0 4dj9A 0 0 0 0 0 0 4dj9B 0 0 0 0 0 0 4e18A 0 0 0 0 0 0 4e18B 0 0 0 0 0 0