Abstract
The localization of major histocompatibility complex (MHC) class I molecules in human endometrial and endocervical epithelial cells was studied with an immunogold technique on ultrathin cryosections. At the cell surface, MHC class I molecules are delivered solely to the basolateral plasma membrane in human epithelia. Therefore, only the basolateral domain of epithelial cells is capable of presenting antigen to MHC class I-restricted cytotoxic T cells.
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