Antibacillin, a Naturally Occurring Inhibitor of Bacillin

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Abstract
Naturally occurring complex organic materials contain an organic substance, herein named "antibacillin," which counteracts the antibacterial action of the antibiotic bacillin. Inorganic salts and H2S also have this property. Antibacillin is liberated on hydrolysis of gelatin or casein. It does not destroy or combine with bacillin but probably acts competitively with the latter for vital systems in susceptible bacteria. The chemical properties of antibacillin are given as well as details for the prepn. of concentrates of the active fraction from gelatin and from P enicillium notatum mycelium.