Specific for Protective antigen of Bacillus anthracis. Do not cross-react with lethal factor antigen of B. anthracis, Y. Pestis, F. Tularensis, Toxoplasma gondii. Can be used for detection of protective antigen of B. anthracis; works in ELISA (recommended pairs (coating-conjugate): BAP0105 - BAP0106) and WB.