Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1am9A 1am9B 4f0rA 1am9A 100 99 15 1am9B 20 100 14 4f0rA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1am9A 1am9B 4f0rA 1am9A 10.9 9.3 0 1am9B 5.9 10.8 0 4f0rA 0 0 75