How many type of glycoprotein that determine the ABO blood groups are found on the RBC's of human - Biology - Principles of Inheritance and Variation

Question

How many type of glycoprotein that determine the ABO blood
groups are found on the RBC's of human?

sneha.manaswita · Accepted Answer

In erythrocytes glycoproteins have different oligosaccharide
units attached to them It is these oligosaccharide units which are
responsible for determining ABO blood group So the type of
glycoprotein depends upon the oligosaccharide which is attached to
it The core structure is which determines the blood group is same
and it is called H-antigen It is modified in 2 types:
1 H- antigen with have oligosaccharides with a terminal Gal-NAc
(Galactose and N-Acetylglucosamine) unit It is responsible for A
blood group
2 H- antigen with have oligosaccharides with a terminal Gal-Gal
unit It is responsible for B blood group
Unmodified H-antigen is responsible for O blood group

How many type of glycoprotein that determine the ABO blood groups are found on the RBC's of human?