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Dombrock blood group (DO): assignment to chromosome 12p
1Institute of Medical Biochemistry and Genetics, Department of Genetics, Copenhagen N, Denmark. he@rclink.imbg.ku.dk
Human Genetics
|November 1, 1996
Summary
The Dombrock blood group (DO) system linkage was studied in 832 families. Results indicate tight linkage with DNA markers D12S358 and D12S364, assigning DO to chromosome region 12p13.2-12p12.1.
Area of Science:
- Genetics
- Immunology
- Molecular Biology
Background:
- The Dombrock blood group system (DO) is a common red cell antigen polymorphism.
- Understanding the genetic basis and chromosomal location of blood group systems is crucial for genetic studies and transfusion medicine.
Purpose of the Study:
- To investigate the genetic linkage of the Dombrock blood group system (DO) with known DNA polymorphisms.
- To determine the chromosomal location of the DO gene.
Main Methods:
- A linkage study was conducted using a family material comprising 832 families from the Copenhagen area.
- Analysis involved assessing the co-segregation of Dombrock blood group antigens with flanking DNA polymorphisms D12S358 and D12S364.
Main Results:
- A strong indication of tight linkage was found between the Dombrock blood group system and the DNA polymorphisms D12S358 (z = 7.66) and D12S364 (z = 8.53).
- The Dombrock blood group system (DO) was assigned to the chromosomal region 12p13.2-12p12.1 using physically localized markers.
Conclusions:
- The Dombrock blood group system is tightly linked to DNA markers D12S358 and D12S364.
- The chromosomal location of the Dombrock blood group system has been refined to 12p13.2-12p12.1.