Description_x000D_ Application_x000D_ Non-animal sourced L-cystine is used as a cell culture media component for the commercial biomanufacture of therapeutic recombinant proteins and monoclonal antibodies._x000D_ Packaging_x000D_ 1 kg in poly bottle_x000D_ 25, 100 g in poly bottle_x000D_ Biochem/physiol Actions_x000D_ Cystine is the dimeric form of cysteine. Cysteine is the source of disulfide linkages in proteins and has a role in sulfur transport. It undergoes rapid oxidation to form cystine at physiological pH. L-Cystine is crucial for oxygen production and low density lipoprotein modification by arterial smooth muscle cells. It also has a role in the synthesis of glutathione._x000D_ Caution_x000D_ hygroscopic