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. 1982 Sep 1;156(3):731–743. doi: 10.1084/jem.156.3.731

Serologic identification of the human secondary B cell antigens. Correlations between function, genetics, and structure

PMCID: PMC2186782  PMID: 6809881

Abstract

The secondary B cell (SB) antigens are polymorphic HLA-linked antigens on human B cells and macrophages that are identified by primed T cell responses but are genetically distinct from the HLA-DR, MB, and MT antigens. Serologic identification of the SB molecule, using the monoclonal antibody ILR1, now makes it possible to correlate the function of these determinants in human T cell recognition with an Ia- like molecular structure and a genetic locus that marks a new HLA subregion. Three lines of evidence indicate that the ILR1 molecule identifies an epitope on some alleles of the SB gene: (a) the polymorphism of ILR1 -reactivity in the population correlates with SB2 SB3; (b) T cell proliferative response to SB2 and SB3 are specifically inhibited by ILR1; and (c) ILR1 reactivity is exactly concordant with the expression of SB2 in a panel of HLA-deletion mutant lymphoblastoid cell line. Together with previous studies, these results indicate that the SB antigens are on Ia-like molecules. Furthermore, the serologic studies of HLA-deletion mutant cell lines demonstrate that there are two HLA regions centromeric to HLA-B controlling expression of Ia-like molecules: a region toward HLA-B that controls expression of HLA-DR, and a region toward GLO that controls expression of SB.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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