Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2dc5A 4ml9A 4ml9B 2dc5A 100 42 40 4ml9A 28 100 98 4ml9B 27 98 100 FOLD SIMILARITY (Z-SCORE) 2dc5A 4ml9A 4ml9B 2dc5A 39.9 0 0 4ml9A 0 51.8 48.2 4ml9B 0 48.2 52.6