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A water-soluble mixture of proteoses and amino acids derived from albumin, meat, or milk; used as a nutrient and to prepare nutrient media for bacteriology.



a product formed by the partial hydrolysis of proteins and consisting chiefly of a mixture of various polypeptides and also containing dipeptides, tripeptides, and free amino acids. Peptones are formed by the action of proteolytic enzymes in gastric and pancreatic juices (pepsin, trypsin) on proteins or by careful hydrolysis of proteins in acid or alkaline solutions. The composition and name of a peptone depend on the type of protein from which the peptone is derived. Thus, there are meat peptones, fish peptones egg peptones, and others. Peptones are used in microbiology for the preparation of nutrient media.

References in periodicals archive ?
MB established a commercial operation based on the sale of pet and livestock feed--at the lower end of value chain, but has the potential to develop a marine peptone for the fermentation market--the higher end of the value chain.
RCT's peptide and peptone laboratories have been in their fields for over thirty years.
Bactosoytone, the medium that is used to cultivate bacteria in the process of making monosodium glutamate, is one of the peptones.
The TSB 3P with Vegetable Peptones features a unique and patented color indicator that changes from pink to yellow if a bacterial contaminant is present.
Coming directly from milk and not from lactoserum, the protein composition of Prolacta 90 is free from GMP (glycomacropeptide) and proteose peptones.