Mooi, F.R.

strain plasmid antigen expression immunization vaccine bacteria promoter antibody response 3261-mfg salmonella protein number figure virus system immunodeficiency virus typhimurium heterologous antigens heterologou pl promoter immunodeficiency level serum infection pyz 17 vector invertible stability control mbp-gag fusion protein balb /c mice attenuated orientation result immunity t 7 promoter challenge polymerase mbp-gag plasmid stability volume fusion titer netherland table route elisa room temperature tijhaar petmalgag expression levels carrier amount construction protection induction heterologous antigen subunit 3261-ctxb invertible promoter system clone invertible promoter 3261 strains titre population copy number antigen expression fragment osterhau stably macaque transcription cytotoxic transmission electron microscopy maltose binding protein culture sigma immuno chemicals plate