Blood group antigens are sugars attached to the surface of red blood cell. Individuals inherit a gene that codes for a particular enzyme responsible for a specific sugar(s) to be added to the red cell. The type of sugar added determines the blood group.
ABO Genetic Quiz
See table 1: ABO blood group system
glycosyltransferease enzymes and immunodominant sugars
|
Antigen |
Immunodominant sugar
|
Glcosyltransferase (enzyme) |
Gene |
|
H |
L-fucose
|
L-fucosyl transferase |
H |
|
A |
N-acetyl-D-galactosamine
|
N-acetylgalactosaminyltransferase |
A |
|
B |
D-galactose
|
D- galactosyl transferase |
B |
Quiz Preview
What is the immunodominant sugar responsible for blood group H specificity?
L-fucose
What is the immunodominant sugar responsible for blood group A specificity?
N-acetyl-D-galactosamine
What is the immunodominant sugar responsible for blood group B specificity?
D-galactose
Which of the following ABO blood group has the most amount of H substance
Blood group O
