Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1hm9A 3c9iA 3t57A 1hm9A 100 0 65 3c9iA 90 100 0 3t57A 65 0 100 FOLD SIMILARITY (Z-SCORE) 1hm9A 3c9iA 3t57A 1hm9A 57 0 22.7 3c9iA 0 14.4 0 3t57A 22.7 0 48.6