... 1.Yeast Extract for culture mediaA natural soluble paste or powder which is made from fresh brewer yeast latex with the ... :l Industrial fermentation raw materialAmino acids, antibiotics, nisin, lactic acid, polymer, VC, inosine, ect.l Microbiological mediumPseudomonas, acetobacter, gluconobacter oxydans, ... , streptococcus lactic, staphylococcus, yeast and mycoplasma, ect. Yeast Extract Powder(GPL-931)