Characterization of cross-reacting antigens on the Epstein-Barr virus envelope and plasma membranes of producer cells
- PMID: 217544
- DOI: 10.1016/0092-8674(79)90185-5
Characterization of cross-reacting antigens on the Epstein-Barr virus envelope and plasma membranes of producer cells
Abstract
A rabbit antiserum has been prepared against the B95-8 transforming strain of EBV. The antiserum has a high virus neutralizing titer (approximately 1:1000) against both the marmoset B95-8 EBV and the human P3HR-1 EBV. The neutralizing antibodies may be absorbed completely with EBV producer cell lines, but not with nonproducer cell lines or producer cell lines treated with phosphonoacetic acid (PAA) so as to be nonproducer. After repeated absorption with PAA-treated B95-8, the serum remains reactive with the membranes of producer cell lines as judged by immunofluorescence or the 125I--Staphylococcal protein A radioimmunoassay. Thus the neutralizing antigens are expressed on the membranes of producer cell lines and may be purified from this source using the serum and 125I--Staph A binding as an assay. The ability of the serum to differentiate between producer and nonproducer cells by means of cell surface determinants has been exploited to achieve a separation of these two populations from the same culture. Immunoprecipitation by the protein A technique shows that the serum recognizes two polypeptides from producer cells of approximate molecular weights 150,000 and 75,000.
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