Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1nkpA 1nkpB 3ii9A 1nkpA 100 49 0 1nkpB 49 100 0 3ii9A 0 0 100 FOLD SIMILARITY (Z-SCORE) 1nkpA 1nkpB 3ii9A 1nkpA 11.1 8.9 1 1nkpB 8.9 10.9 0 3ii9A 0 0 69.8