... Nisin (also known as Streptococcus lactic peptide) is a polypeptide, it is rapidly inactivated in the intestine by digestive enzymes after ... , ,it has excellent solubility and stability in food. It is not effective against Gram-negative bacteria, yeasts or mould. Molecular formula ... flavorings, plant protein drinks, baked products, instant food, beer, wine ect. It can also be used as a preservative in ...