Identification of CD4+ T cell epitopes in HIV-1 protease: Recognition of wild type and mutant epitopes - Muller, Natalie G.; Souza, Edna B.; Alencar, Rosa; Jamal, Leda; Brindeiro, Rodrigo R.; Kalil, Jorge; Moraes, Sandra L.; Cunha Neto, Edecio (Meeting of the Brazilian Society for Immunology, 2008)