Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3vgxC 5z0wE 3vgxC 100 6 5z0wE 6 100 FOLD SIMILARITY (Z-SCORE) 3vgxC 5z0wE 3vgxC 6 4.8 5z0wE 4.8 5.7