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Immunoglobulin kappa locus
Symbols IGK ; IGK@
External IDs GeneCards: IGK Gene
Species Human Mouse
Entrez 50802 n/a
Ensembl n/a n/a
UniProt n/a n/a
RefSeq (mRNA) n/a n/a
RefSeq (protein) n/a n/a
Location (UCSC) n/a n/a
PubMed search [1] n/a

Immunoglobulin kappa locus, also known as IGK@, is a region on human chromosome 2 that contains genes for the kappa (κ) light chains of antibodies (or immunoglobulins).[1]

In humans the κ chain is coded for by V (variable), J (joining) and C (constant) genes in this region.[2] These genes undergo V(D)J recombination to generate a diverse repertoire of immunoglobulins.


The immunoglobulin kappa locus contains the following genes:

  • IGKC: immunoglobulin kappa constant
  • IGKJ@: immunoglobulin kappa joining group
  • IGKV@: immunoglobulin kappa variable group
    • IGKV1-5, IGKV1-6, IGKV1-8, IGKV1-9, IGKV1-12, IGKV1-16, IGKV1-17, IGKV1-27, IGKV1-33
    • IGKV1D-8, IGKV1D-12, IGKV1D-13, IGKV1D-16, IGKV1D-17, IGKV1D-22, IGKV1D-27, IGKV1D-32, IGKV1D-33, IGKV1D-39, IGKV1D-43
    • IGKV2-24, IGKV2-28, IGKV2-30, IGKV2-40
    • IGKV2D-26, IGKV2D-28, IGKV2D-29, IGKV2D-30, IGKV2D-40
    • IGKV3-11, IGKV3-15, IGKV3-20
    • IGKV3D-7, IGKV3D-11, IGKV3D-20
    • IGKV4-1
    • IGKV5-2
  • and a number of non-functional and pseudogenes


  1. ^ Criscitiello MF, Flajnik MF (2007). "Four primordial immunoglobulin light chain isotypes, including lambda and kappa, identified in the most primitive living jawed vertebrates". Eur. J. Immunol. 37 (10): 2683–94. doi:10.1002/eji.200737263. PMID 17899545. 
  2. ^ Male, D., Brostoff, J., Roth, D.B., & Roitt, I. 2006. Immunology. 7th ed., Canada: Elsevier Limited

Further reading[edit]