Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1yqhA 1yqhB 5j49A 1yqhA 100 97 22 1yqhB 97 100 21 5j49A 29 38 100 FOLD SIMILARITY (Z-SCORE) 1yqhA 1yqhB 5j49A 1yqhA 22.3 19.6 0 1yqhB 19.6 21.8 0 5j49A 0 0 49.4