Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1noxA 4hh3B 4hh3C 1noxA 100 84 42 4hh3B 53 100 2 4hh3C 34 2 100 FOLD SIMILARITY (Z-SCORE) 1noxA 4hh3B 4hh3C 1noxA 33.6 0 0 4hh3B 0 28.5 0 4hh3C 0 0 40.9