Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2zd7A 2zd7B 4nqfA 2zd7A 100 97 31 2zd7B 97 100 32 4nqfA 27 22 100 FOLD SIMILARITY (Z-SCORE) 2zd7A 2zd7B 4nqfA 2zd7A 33.9 30.6 0 2zd7B 30.6 33.8 0 4nqfA 0 0 30.1