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Differential and constitutive expression of the DRB1 and DRA gene products controls the surface HLA-DR expression level in human eosinophilic leukaemia cell lines


, : Differential and constitutive expression of the DRB1 and DRA gene products controls the surface HLA-DR expression level in human eosinophilic leukaemia cell lines. Cell Structure and Function 22(1): 15-20

Use of 2-D gel and imaging plate analysis enabled biosynthetically radiolabeled immunoprecipitates to be quantitated at the very low level of gene products during processing from RER inside cells to cell surface. We used this efficient and sensitive measurement to analyse expression of HLA-DR molecules in human eosinophilic leukaemia cell lines. We found that they synthesized a constitutive amount of DRA gene products and differential amounts of DRB1 gene products. Thus, the incompletely inducible expression of DRB1 gene products was responsible for the limited accumulation of normally assembled molecules for cell surface expression and the lack of serological determination.

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PMID: 9113385


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