Abstract
B-cell stimulatory factor-1 (BSF-1)1, formerly designated B-cell growth factor, is a T-cell-derived factor required for entry into the S phase of the cell cycle by B cells stimulated with low concentrations of anti-IgM antibodies2–5. BSF-1 acts directly on resting B cells to prepare them to synthesize DNA more promptly on subsequent exposure to competent stimuli6,7 and to strikingly enhance their expression of class II molecules of the major his-tocompatibility complex8,9. Previous studies have shown that murine BSF-1 can be separated physically from interleukin-2 (IL-2) and that the molecule has an apparent relative molecular mass (Mr) of ∼ 15,000 and pI values of 6.4–6.7 and 7.4 (ref. 10). Here, we report the production of a monoclonal antibody to BSF-1, its use in characterizing BSF-1, and functional studies demonstrating that this molecule is distinct from IL-1, IL-2 and IL-3.
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Ohara, J., Paul, W. Production of a monoclonal antibody to and molecular characterization of B-cell stimulatory factor-1. Nature 315, 333–336 (1985). https://doi.org/10.1038/315333a0
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DOI: https://doi.org/10.1038/315333a0
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