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Related Experiment Videos

Serotype switching in a partially deleted RHD gene

T Blunt1, G Daniels, B Carritt

  • 1MRC Human Biochemical Genetics Unit, University College, London, UK.

Vox Sanguinis
|January 1, 1994
PubMed
Summary

Researchers investigated RhD-negative blood types with the dCes haplotype. Unlike typical RhD-negative cases, the dCes haplotype has an RHD gene with an internal deletion, impacting RhC antigen expression.

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Area of Science:

  • Genetics
  • Immunology
  • Blood Group Serology

Background:

  • RhD-negative individuals typically lack the RHD gene.
  • The dCes haplotype presents an unusual genetic arrangement within the Rh blood group system.

Purpose of the Study:

  • To characterize the genetic structure of the RHD gene in individuals with the RhD-negative dCes haplotype.
  • To understand the molecular basis of Rh antigen expression in dCes/dce genomes.

Main Methods:

  • Analysis of RH gene structure in dCes haplotype donors.
  • Investigation of 5' sequences associated with RhC antigen expression.

Main Results:

  • The dCes haplotype possesses an RHD gene with an internal deletion, not a complete gene deletion.
  • Absence of typical 5' RHC sequences suggests altered RhC antigen encoding.

Conclusions:

  • The dCes haplotype's RHD gene structure differs from common RhD-negative haplotypes.
  • RhC antigen expression in dCes/dce genomes may result from a truncated RHD or a recombinant RHD/CE gene.

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