| Literature DB >> 3339254 |
Abstract
Three sandwich-type enzyme-linked immunosorbent assays (ELISA) are described for the measurement of free secretory component (SC) and SC bound to IgA (S-IgA) or IgM (S-IgM). These assays do not require preliminary fractionation of the biological fluids to be tested. The specificity of the assays is achieved with monoclonal antibodies specific for free SC (855 SC) and for SC bound to IgA or IgM (8545 SA). The amount of the three SC molecules in various biological fluids is reported. We demonstrate the presence of low levels of free SC in most of these fluids, including normal serum. Moreover our results suggest that S-IgM in serum may result from a non-covalent association between serum IgM and free SC.Entities:
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Year: 1988 PMID: 3339254 DOI: 10.1016/0022-1759(88)90191-3
Source DB: PubMed Journal: J Immunol Methods ISSN: 0022-1759 Impact factor: 2.303