Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1gkmA 4nqwA 4nqwB 1gkmA 100 47 0 4nqwA 79 100 12 4nqwB 0 5 100 FOLD SIMILARITY (Z-SCORE) 1gkmA 4nqwA 4nqwB 1gkmA 64.2 0 0 4nqwA 0 27.1 0.7 4nqwB 1 1.2 12.7