Production of human monoclonal antibody to X31 influenza virus nucleoprotein.

In vitro stimulation of human peripheral blood mononuclear cells with X31 influenza virus antigen has been used to enrich for specific anti-X31 antibody-producing cells. Following Epstein-Barr virus transformation of these stimulated cells, a cell line which produces human antibody to X31 virus was derived and subsequently cloned. The cloned cells secrete and IgGl kappa antibody which is directed against the nucleoprotein of A type influenza virus. Culture supernatants contain 10 to 20 micrograms/ml of specific antibody which is now used as a standard for the ELISA assay used in our laboratory to detect antibodies to influenza virus.

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