Kaydı eposta ile gönder: An Immunodominant K(b)-Restricted Peptide from the p15E Transmembrane Protein of Endogenous Ecotropic Murine Leukemia Virus (MuLV) AKR623 That Restores Susceptibility of a Tumor Line to Anti-AKR/Gross MuLV Cytotoxic T Lymphocytes