Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2wiiA 3hrzA 4hrvA 5fo8A 2wiiA 100 92 76 100 3hrzA 92 100 64 92 4hrvA 0 58 100 84 5fo8A 100 92 63 100 FOLD SIMILARITY (Z-SCORE) 2wiiA 3hrzA 4hrvA 5fo8A 2wiiA 57.8 46.9 0 51.5 3hrzA 46.9 61.4 0.6 49.3 4hrvA 0 0.5 26.7 0 5fo8A 51.5 49.3 0 61.3