Description_x000D_ General description_x000D_ L-Valine is an essential non-polar amino acid. D-Valine is the non-proteinogenic isomer of valine._x000D_ Application_x000D_ D-valine is used in cell culture as a selective inhibitor of cell proliferation, wherein it inhibits cells that lack the enzyme D-amino acid oxidase. Historically D-valine has been used to inhibit fibroblast growth while allowing selective growth of epithelial cells._x000D_ Packaging_x000D_ 1, 5, 25 g in poly bottle