Abstract

The precise physicochemical conditions under which two examples of mouse monoclonal anti-N can be used as blood grouping reagents have been defined. The antibodies were shown to belong to the IgG1 and IgG2b subclasses respectively and both reacted within discrete ranges of temperature and pH with optimal reactions occurring at 20 degrees C or less and pH 8.5. Under these conditions and at concentrations of 2-3 micrograms/ml, the antibodies were used, in parallel with conventional polyclonal antisera, to type a series of random blood donors. The results obtained with one of the monoclonal antibodies and the polyclonal reagents were in perfect agreement and the monoclonal antibody was judged to have considerable potential as an N-grouping reagent.

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