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Efficient selection of μ m mutants from μm-expressing myeloma cells by treatment with ricin A-conjugated anti-μ antibody

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Somatic Cell and Molecular Genetics

Abstract

We have developed an efficient system for obtaining myeloma mutants defective intrans-acting factors required for immunoglobulin (Ig) gene expression. The system consists of a myeloma cell line designed for this purpose and an efficient method for selecting mutants from it. The cell line is X63.653 transfected with the μ gene, whose tailpiece sequence was replaced with the transmembrane sequence of human EGF receptor to hold μ on the cell surface and whose CH1 sequence was removed to prevent μ from being retained in the endoplasmic reticulum. It efficiently and stably expressed μ chains of IgM on the cell surface (μ +m ) without light chains. To obtain mutants lacking μm m ) from the μ +m cell line by selectively killing μ +m cells, a method with ricin A-conjugated anti-μ antibody was more reliable than complement lysis mediated by anti-μ antibody. Applying the system, we obtained a variety of μ m mutants.

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Shindo, T., Ueda, H., Makishima, F. et al. Efficient selection of μ m mutants from μm-expressing myeloma cells by treatment with ricin A-conjugated anti-μ antibody. Somat Cell Mol Genet 18, 553–558 (1992). https://doi.org/10.1007/BF01232651

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  • DOI: https://doi.org/10.1007/BF01232651

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