Peptone bacteriological is used as culture media ingredient in variety of media as it contains high tryptophan, while it is  prepared by enzymatic digestion of selected fresh meat.   Due to its highly nutritional value it supports good growth of wide variety of microorganisms and can be used for identification of bacteria by performing various biochemical tests.   As peptones conforms nutritional benefit, especially at low dilution rates, for the recombinant cell lines it have been recently used as medium additives for the production of a recombinant therapeutic protein in high density perfusion cultures of mammalian cells .   It can also be used for commercial production of enzymes, vaccines, antibiotics, steroids and other products.