IMMUNOCHEMICAL STUDIES ON BLOOD GROUPS : I. ESTIMATION OF A AND B ISOANTIBODIES IN HUMAN SERUM BY THE QUANTITATIVE PRECIPITIN METHOD.
1. With purified blood group A and B specific substances from the gastric mucin of pigs precipitin reactions can be obtained in sera containing homologous isoagglutinins. By microquantitative precipitin technics the anti-A and anti-B content of normal and immune isoagglutinin-containing sera can be estimated on a weight basis. 2. There was a general correlation between antibody N precipitable from the sera of groups O and B by A substance and the agglutinin titer for A erythrocytes before and after immunization with blood group substances. 3. The reaction between A substance and its homologous isoagglutinin present in the sera of immunized individuals was of the same type as in other antigen-antibody systems.
Kabat
E A
EA
Department of Neurology, College of Physicians and Surgeons, Columbia University and the Neurological Institute of New York.
Bezer
A E
AE