Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1yc9A 3g8rA 1yc9A 100 75 3g8rA 0 100 FOLD SIMILARITY (Z-SCORE) 1yc9A 3g8rA 1yc9A 45.9 0 3g8rA 0 48.2