The H antigen which is the precursor for the ABO blood group is a ........sequence linked to a ........

Options :
  1. Carbohydrate..........protein
  2. Protein.........Carbohydrate
  3. Protein.........Fat molecule
  4. None of the above

Answer and Explanation :-

Answer: Option 1


The H antigen is a carbohydrate sequence with carbohydrates linked mainly to protein (with a minor fraction attached to ceramide moiety). It consists of a chain of ?-D-galactose, ?-D-N-acetylglucosamine, ?-D-galactose, and 2-linked, ?-L-fucose.

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