Dolichos Biflorus Agglutinin (DBA), Unconjugated, 5 mg. DBA is a glycoprotein with a molecular weight of about 111 kDa and consists of 4 subunits of approximately equal size. This lectin has a carbohydrate specificity toward alpha-linked N-acetylgalactosamine. It has been used to establish secretor status in blood group A individuals by hemagglutination inhibition techniques and for blood typing. This lectin has also been used as a general marker of developing renal collecting ducts. Inhibiting/Eluting Sugar: 200 mM N-acetylgalactosamine.