Production of a monoclonal antibody to and molecular characterization of B-cell stimulatory factor-1 - PubMed (original) (raw)

. 1985 May;315(6017):333-6.

doi: 10.1038/315333a0.

• PMID: 2582266
• DOI: 10.1038/315333a0

Production of a monoclonal antibody to and molecular characterization of B-cell stimulatory factor-1

J Ohara et al. Nature. 1985 May.

Abstract

B-cell stimulatory factor-1 (BSF-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 antibodies. BSF-1 acts directly on resting B cells to prepare them to synthesize DNA more promptly on subsequent exposure to competent stimuli and to strikingly enhance their expression of class II molecules of the major histocompatibility complex. 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 approximately 15,000 and pI values of 6.4-6.7 and 7.4. 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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