has role has_role has role has role has_role has role virulence factor protein role protective antigen role Bordetella pertussis protein Prn Researchers constructed isogenic mutants of B. pertussis Tohama expressing the alleles ptxA1 or ptxA2 and prn1 or prn2 and compared the efficacies of an acellular pertussis vaccine against the mutants in a mouse model. While the vaccine was effective against all of the B. pertussis strains regardless of the allele expression pattern, the strain expressing ptxA1 and prn2 displayed a survival advantage over the other strains [PubMed: 20357056]. Researchers constructed isogenic mutants of B. pertussis Tohama expressing the alleles ptxA1 or ptxA2 and prn1 or prn2 and compared the efficacies of an acellular pertussis vaccine against the mutants in a mouse model. While the vaccine was effective against all of the B. pertussis strains regardless of the allele expression pattern, the strain expressing ptxA1 and prn2 displayed a survival advantage over the other strains [PMID:20357056]. YH, ZX 378 Protegen ID: 378; NCBI Gene GI: 2664290; NCBI Protein GI: 33592195; NCBI Protein Accession: NP_879839; NCBITaxon: 257313