?:definition
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lymphokine produced by antigen or mitogen activated T lymphocytes that enhances the ability of B lymphocytes to present antigen, primes B lymphocytes to proliferate in response to anti-Ig and lipopolysaccharide, and regulates the production of IgG and IgE by B lymphocytes; it also acts as a growth factor for T lymphocytes and as a maturation factor for mast cells.
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