Description_x000D_ General description_x000D_ PharmaGrade products are manufactured under appropriate controls for use as a raw material in pharma or biopharmaceutical production. For more information on the PharmaGrade Program, visit sigma-aldrich.com/safc-pharmagrade._x000D_ To request the Enhanced Quality Product Documentation for this product, please contact Customer Support and select ‘Product Documentation’. Please note that access to the Enhanced Quality Product Documentation for this product requires a confidentiality disclosure agreement._x000D_ Application_x000D_ L-Glutamine is an essential amino acid that is a crucial component of culture media that serves as a major energy source for cells in culture. L-Glutamine is very stable as a dry powder and as a frozen solution. In liquid media or stock solutions, however, L-Glutamine degrades relatively rapidly. Optimal cell performance usually requires supplementation of the media with L-Glutamine prior to use._x000D_ Biochem/physiol Actions_x000D_ L-Glutamine is an essential amino acid that is a crucial component of culture media that serves as a major energy source for cells in culture. L-Glutamine is very stable as a dry powder and as a frozen solution. In liquid media or stock solutions, however, L-glutamine degrades relatively rapidly. Optimal cell performance usually requires supplementation of the media with L-glutamine prior to use.