Thermo Fisher, J61651.22, L-Cystine, Cell Culture Reagent, Thermo Scientific Chemicals

L-Cystine, Cell Culture Reagent, Thermo Scientific Chemicals L-cysteine acts as a major source of sulfur in cell culture. Cysteine has been used in pulse-chase experiments to study protein expression from an inducible promoter. L-Cysteine is used to supplement cell culture media. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals. CAS: 56-89-3
IUPAC Name: (2R)-2-amino-3-{[(2R)-2-amino-2-carboxyethyl]disulfanyl}propanoic acid
Molecular Formula: C6H12N2O4S2
InChI Key: LEVWYRKDKASIDU-IMJSIDKUSA-N
SMILES: N[C@@H](CSSC[C@H](N)C(O)=O)C(O)=O
Appearance (Color): White
Comment: Microbial Count: ≤1000 cfu/g (total plate count)
Loss on Drying: ≤0.2%
Sulfated Ash: ≤0.1%
Form: Crystals or crystalline powder