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Immunoassay reagents intended to perform qualitative and/or quantitative immunologic tests of a sample of body fluids (typically serum) to determine either one of two different cytokines known as tumor necrosis factors (TNF alpha and beta). They conduct cytotoxic activity against tumors and virally infected cells. TNF alpha is secreted by macrophages while TNF beta is produced by both CD4 and CD9 lymphocytes.
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