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A murine monoclonal antibody of specificity anti-Lub was produced. Immunoblotting of the electrophoretically separated components of membranes from Lu(b+) red cells with the monoclonal antibody identified two glycoproteins of relative molecular mass 85 and 78 kd, respectively. The expression of Lub antigenic activity on these glycoprotein components was shown to be dependent on the presence of one or more N-glycosidically linked oligosaccharides and on the presence of disulphide bonding.
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