– Plays a role in masking infected cells for immune recognition by cytotoxic T-lymphocytes. Down-regulates the expression of the host TAP1 gene (transporter associated with antigen processing), thereby affecting the transport of peptides into the endoplasmic reticulum and subsequent peptide loading by MHC class I molecules. Inhibits IFN-gamma synthesis. Epstein-Barr virus (strain B95-8) BCRF1 Protein (His & Myc) is expressed in E. coli expression system with N-10xHis and C-Myc tag. The predicted molecular weight is 24.8 kDa and the accession number is P03180.