The MHC Class I Homolog of Human Cytomegalovirus Is Resistant to Down-Regulation Mediated by the Unique Short Region Protein (US)2, US3, US6, and US11 Gene Products

Abstract excerpt

Human CMV encodes four unique short region proteins (US), US2, US3, US6, and US11, each independently sufficient for causing the down-regulation of MHC class I molecules on the cell surface. This down-regulation allows infected cells to evade recognition by cytotoxic T cells but leaves them susceptible to NK cells, which lyse cells that lack class I molecules. Another human CMV-encoded protein, unique long region...

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