Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3d9xA 3ju4A 4uxeA 3d9xA 100 28 64 3ju4A 57 100 100 4uxeA 53 91 100 FOLD SIMILARITY (Z-SCORE) 3d9xA 3ju4A 4uxeA 3d9xA 12.7 0 1.9 3ju4A 0 70.2 2.7 4uxeA 1.2 0.5 31.4