Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3mgnA 5z0wE 3mgnA 100 6 5z0wE 6 100 FOLD SIMILARITY (Z-SCORE) 3mgnA 5z0wE 3mgnA 6.5 4.5 5z0wE 4.3 5.7