A method for inducing an immune response against HIV in a subject includes preparing first and second HIV-1 protein coding sequences, introducing the first and second HIV-1 protein coding sequence into first and second expression constructs using yeast homologous recombination, transfecting a cell with the first and second, wherein the HIV-1 particle is secreted by the cell, and administering the secreted HIV-1 particle and a pharmaceutically acceptable carrier to the subject, wherein the secreted HIV-1 particle stimulates an immune response.
