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Related Experiment Videos

cDNA clones encoding mink immunoglobulin lambda chains

A M Najakshin1, J S Belousov, Alabyev BYu

  • 1Institute of Cytology and Genetics, Novosibirsk, Russia.

Molecular Immunology
|September 1, 1993
PubMed
Summary

Researchers identified mink immunoglobulin lambda light chain genes, finding they share high homology with human counterparts. This suggests extensive gene duplication in mink lambda genes, similar to primates.

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Comparative Genomics

Background:

  • Immunoglobulin lambda light chains are crucial components of the adaptive immune system in vertebrates.
  • Understanding the genetic basis of immunoglobulin diversity is essential for immune system research.

Purpose of the Study:

  • To isolate and characterize mink immunoglobulin lambda light chain genes.
  • To compare mink lambda gene sequences with those of other mammalian species.
  • To investigate the evolutionary duplication patterns of lambda genes in carnivores.

Main Methods:

  • Screening of a mink cDNA library using antibody probes.
  • Isolation and sequencing of cDNA clones (pIGL-2 and pIGL-10).
  • Sequence homology analysis and Southern blot hybridization of mink DNA.

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Main Results:

  • Isolation of clone pIGL-2 containing a full-length mink Ig lambda chain coding sequence.
  • Identification of high sequence homology between mink and human lambda chain genes.
  • Southern blot analysis indicated extensive duplication of C lambda and V lambda genes in mink.
  • Mink V lambda sequences show homology to human subgroup III V lambda genes.

Conclusions:

  • Mink immunoglobulin lambda genes exhibit significant homology to human genes, particularly in V and C regions.
  • The lambda gene repertoire in mink has undergone extensive duplication, mirroring patterns observed in primates.
  • These findings provide insights into the evolution of the immune system in carnivores.