Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA or a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA ro a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA or a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA or a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA or a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: A recombinant microorganism comprises an asporogenic Bacillus subtilis strain in which a gene encoding a protease enzyme has been downregulated or inactivated. In particular sigma factorspoIIAC is inactivated such that the strain is asporogenic. These strains are particularly useful as expression vehicles for proteins such as protective antigen (PA) of Bacillus anthracis.

Abstract: A recombinant microorganism comprises an asporogenic Bacillus subtilis strain in which a gene encoding a protease enzyme has been downregulated or inactivated. In particular sigma factorspoIIAC is inactivated such that the strain is asporogenic. These strains are particularly useful as expression vehicles for proteins such as protective antigen (PA) of Bacillus anthracis.

Abstract: An immunogenic reagent which produces an immune response which is protective against Bacillus anthracis, said reagent comprising one or more polypeptides which together represent up to three domains of the full length Protective Antigen (PA) of B. anthracis or variants of these, and at least one of said domains comprises domain 1 or domain 4 of PA or a variant thereof. The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells, vectors and nucleic acids used in the method are also described and claimed.

Abstract: A pharmaceutical composition which comprises microparticles comprising (i) a biologically active compound capable of generating an immune response in an animal to which it is administered which is protective against a pathogen; (ii) a polymeric material capable of forming microspheres; and (iii) an immunostimulant comprising a phospholipid. The composition is particularly useful for the oral administration of vaccines.