Abstract
A cell line that switches from μ to γ2b synthesis during growth in culture uses the same VH region for both heavy chains but retains two copies of the Cμ gene. This suggests that the μ to γ2b class switch can occur, at least in part, by an RNA processing mechanism. Regulatory variants of this cell line lose constitutive μ-chain synthesis but simultaneously acquire lipopolysaccharide(LPS)-inducible synthesis of that chain. This co-variation is allele-specific and is correlated to a large deletion of DNA in the JH–Cμ intron.
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Alt, F., Rosenberg, N., Casanova, R. et al. Immunoglobulin heavy-chain expression and class switching in a murine leukaemia cell line. Nature 296, 325–331 (1982). https://doi.org/10.1038/296325a0
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DOI: https://doi.org/10.1038/296325a0
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