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A recombinant vaccinia has been designed to express amino acids 366-379 of influenza nucleoprotein, previously shown to be the minimal epitope recognized by a class I-restricted cytotoxic T cell clone. Target cells infected with the recombinant vaccinia virus expressing this peptide are recognized by CTL as efficiently as target cells expressing the complete nucleoprotein. The results imply the existence of a peptide transport system that constitutively passes the products of degraded proteins from the cytoplasm into a membrane-bound compartment of the cell.

Original publication




Journal article


J Exp Med

Publication Date





1051 - 1056


Animals, Cytoplasm, Epitopes, Histocompatibility Antigens Class I, Influenza A virus, Mice, Mice, Inbred CBA, Nucleoproteins, Peptide Fragments, RNA-Binding Proteins, T-Lymphocytes, Cytotoxic, Vaccinia virus, Viral Core Proteins, Viral Proteins