has role protective antigen role protective antigen Mycobacterium tuberculosis protein HBHA Purified preparations of HBHA were emulsified in a dimethyldioctadecylammonium bromide-monophosphoryl lipid A adjuvant and tested for the ability to reduce M. tuberculosis infection in the mouse aerosol challenge model for tuberculosis. The HBHA-containing vaccine gave a approximately 0.7-log reduction in CFU in both mouse lungs and spleens compared to adjuvant controls 28 days following challenge [PubMed: 15557600]. Oliver He Allen Xiang protein Protegen ID: 821; NCBI Gene GI: 5211814; NCBI Protein GI: 148660242; NCBI Protein Accession: YP_001281765; NCBITaxon: 25177