Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2hy6A 4p2xA 4p2xB 2hy6A 100 0 0 4p2xA 0 100 99 4p2xB 0 99 100 FOLD SIMILARITY (Z-SCORE) 2hy6A 4p2xA 4p2xB 2hy6A 5.2 0.5 0.5 4p2xA 0 22.4 17.3 4p2xB 0 17.3 21.9