Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 5ld9A 5ys9A 5ld9A 100 40 5ys9A 26 100 FOLD SIMILARITY (Z-SCORE) 5ld9A 5ys9A 5ld9A 29.8 0 5ys9A 0 63.9