Incoming HIV virion-derived Gag Spacer Peptide 2 (p1) is a target of effective CD8+ T cell antiviral responses by Yang, H, Llano, A, Cedeño, S, von Delft, A, Corcuera, A, Gillespie, GM, Knox, A, Leneghan, DB, Frater, J, Stöhr, W, Fidler, S, Mothe, B, Mak, J, Brander, C, Ternette, N, Dorrell, L