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Transcript 
ABO System
• H gene
• Se gene
• AB genes
•
•
•
•
L – Fucose
N –acetyl galactosamine
Galactose
N-acetylglucosamine
ABO Blood
Group Antigens
A
NAG
Gal
Precursor
oligosaccharide
NAcGA
Fuc
H
NAG
Gal
NAG
Gal
A antigen
Fuc
B antigen
H antigen
NAcGA (N-acetylgalactoseamine)
Gal (galactose)
NAG
B
Gal
Fuc
Gal
ABO Blood Group Reactivity
blood group
to
(phenotype)
A
B
AB
O
O
genotypes antigens antibodies
AA, AO
BB, BO
AB
OO
hh
ABO in serum
A
anti-B
B
anti-A
A and B
none
H
anti-A/B
none
anti A,B,H
‫روشهای انجام گروه خون‬
• Direct method (cell type)
Unknown RBC + anti A ,anti B
• Indirect method (back type)
A cell , B cell + unknown serum
Rh system
• D ,C,c,E,e genes
DCe / c E
DCE / ce
Ce / CE
Dce / DCE
Cell type
RBC + anti D
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