Thursday, July 30, 2026

Antigen Systems

 Antigen Systems


HLA system

CD System

ABO System

Rhesus System

ABO System

All are oligisaccharides.
ceranide-glu-gal-gnac-gal-fucose 
H-Anigen (H-transferase)
ceramide-glu-gal-gnac-gal-fucose-galnac A-Antigen (A-transferase)
ceramide-glu-galgnac-gal-fucose-gal (B-Antigen (B-transferase)
Rhesus System
CDE/cde but d is not expressed

Bacterial cell wall antigens

Polysaccharide cell wall 

N-acetylglucosamine + 

N-acetylmuramide Acid

Polysaccharide backbone + glycine linkage

gnac N-acetylglucosamine

glac galactosamine

G N-acetylglucosamine Bacterial cell wall

M- N-acetylmuramic acid Bacterial cell wall

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