Yeast extract is a concentrate of the water-soluble portion of selected strain yeast cells, specially grown on a molasses-based media, that have been autolyzed. It is rich in vitamins, especially B-complexes, amino acids and other growth factors. It is used in many microbiological culture media formulations as an excellent growth source. Yeast extract is considered a non-animal product and is used extensively for many non-animal formulations of bacterial, fungal, mammalian and insect cell culture.
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