Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1y4mA 3ntnA 3ntnB 5ha6A 1y4mA 100 0 0 6 3ntnA 0 100 97 0 3ntnB 0 97 100 0 5ha6A 6 75 73 100 FOLD SIMILARITY (Z-SCORE) 1y4mA 3ntnA 3ntnB 5ha6A 1y4mA 9.5 0.1 0 2.7 3ntnA 2.1 30.1 28.4 2.1 3ntnB 0 28.4 30.8 0 5ha6A 2.7 0.2 0.7 14