valkude osalisel hüdrolüüsil tekkiv vees lahustuv, kõrgema temperatuuriga keskkonnas mittesadestuv polüpeptiid
any soluble mixture of products, 0.6–3 kDa, of the partial enzymic (or acid) hydrolysis of proteinaceous material. It is used as a constituent of many microbiological culture media.
If the nutritional requirements of a microorganism are known, a chemically defined medium containing only those chemicals can be prepared. More complex media are also routinely used; these generally consist of peptone (a partially digested protein), meat extract, and sometimes yeast extract.
