Abstract
Three IgM human monoclonal antibodies to Jkb, and one IgM human monoclonal antibody to Jka were produced from the lymphocytes of two immunized donors. Two of the anti-Jkb monoclonal antibodies (MS-7 and MS-9) are of the IgM (kappa) isotype and one (MS-8) is an IgM(lambda). The anti-Jka monoclonal antibody (MS-15) is of the IgM(kappa) isotype. They are all specific for their respective antigens, and give positive agglutinations in saline by the immediate spin technique, even against Jk(a+b+) cells. The heterohybridomas have been shown to be suitable for bulk culture and produce levels of antibody that reach 18 micrograms/ml in the spent culture supernatant. They offer considerable advantages over currently available reagents in terms of stability, simplicity and speed of use, and will provide a reliable and unlimited supply of what are at the moment rare and unsatisfactory antibodies.
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