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The Nef protein of primate lentiviruses triggers the accelerated endocytosis of CD4 and of class I major histocompatibility complex (MHC-I), thereby down-modulating the cell surface expression of(More)
A major, apparently novel extracellular matrix-degrading protease was previously identified and partially isolated from hormone-dependent but not from hormone-independent human breast cancer cells(More)
A central nervous system (CNS) cell line, CAD, is known to differentiate in the absence of serum. This cell line was found to differentiate by the treatment of cAMP. Expression of(More)