Polymorphisms among HLA class II molecules expressed by cells with different HLA-DR4 haplotypes were analysed biochemically (isoelectrofocussing and 2D gels), cellularly (HLA-Dw) and serologically (monoclonal antibodies). The results confirm the correlation which exists between HLA-D specificity and DR beta chain isoelectric point polymorphism. Furthermore, a biochemical polymorphism was observed among DQw3 molecules. No correlation was found with HLA-Dw types. On the other hand a correlation was found between DQ-polymorphism and TA10 and 2B3 specificities defined by monoclonal antibodies. The comparison of different methods defining polymorphisms of HLA class II molecules will be discussed.
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Bontrop et al. (1986) studied this question.
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