Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1th7A 2zsjA 3o74A 1th7A 100 3 0 2zsjA 0 100 100 3o74A 9 100 100 FOLD SIMILARITY (Z-SCORE) 1th7A 2zsjA 3o74A 1th7A 18.9 0 0 2zsjA 0 62.3 2.9 3o74A 0 0 48.2