Peptones have a long history of use in cell culture media. However, increasing emphasis has been placed on growing cells in animal-free and chemically defined systems for the production of biopharmaceuticals. This has created a demand for cell culture media supplements that equal the performance of peptones but have greater certainty of composition. This demand prompted BD’s efforts to identify the functional components of yeast extract to develop a chemically defined supplement, BD recharge. Formulation The keys to making a…