Definition of "nisin" [nisin]

• A polycyclic peptide produced by fermentation with the bacterium Lactococcus lactis; used as a preservative in processed cheese etc. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "The problem with commercial nisin is that it's cut with milk."
• "Certain lactic bacteria (notably, Streptococcus lactis) produce the antibiotic nisin, active against gram-positive organisms."
• "Streptococcus lactis produces the polypeptide antibiotic nisin, active against gram-positive organisms, including S. cremoris, which in turn produces the antibiotic diplococcin, active against gram-positive organisms such as S. lactis."