Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1xaoA 3agxA 3agxB 1xaoA 100 24 33 3agxA 24 100 81 3agxB 34 81 100 FOLD SIMILARITY (Z-SCORE) 1xaoA 3agxA 3agxB 1xaoA 17.4 11.5 11.5 3agxA 11.5 24.8 20.4 3agxB 11.5 20.4 24.1