Cell-wall preparation containing poly-γ-d-glutamate covalently linked to peptidoglycan, a straightforward extractable molecule, protects mice against experimental anthrax infection

► Bacillus anthracis peptidoglycan-linked poly-glutamate (GluPG) is a potent antigen. ► GluPG + FIS partially protects mice against an encapsulated B. anthracis challenge. ► GluPG + PA fully protects mice against a B. anthracis virulent strain challenge.