This classification scheme is often appended with a plus or minus indicating the presence or absence of a protein first discovered in the rhesus monkey.
A 2007 study found that a bacterial glycosidase could remove the surface antigens used in this classification scheme. This classification scheme is often appended with a plus or minus indicating the presence or absence of a protein first discovered in the rhesus monkey. This classification scheme was invented by Karl Landsteiner, who explained why some blood transfusions failed. For 10 points, name this classification scheme in which a person is classified as A, B, AB, or O.
A 2007 study found that a bacterial glycosidase could remove the surface antigens used in this classification scheme.
ABO blood groups [or blood {types}]