Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1qfhA 2i0tA 2i0tH 1qfhA 100 30 26 2i0tA 38 100 30 2i0tH 44 30 100 FOLD SIMILARITY (Z-SCORE) 1qfhA 2i0tA 2i0tH 1qfhA 26.8 0 0 2i0tA 0 67 0 2i0tH 0 0 29