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Extracellular cysteine can also directly be taken up by cultured astrocytes and used for GSH synthesis, but its disulfide cystine, that is transported into rat astrocytes mainly by the cystineglutamate antiporter X C , serves as the preferred extracellular substrate for the cytosolic cysteine needed for astrocytic GSH synthesis (Kranich et al

Researchgrade peptides are compounds manufactured for scientific use with strict identity, purity, and documentation standards, but not approved for clinical application

Ann Thorac Surg 69(2):369-75, 2000

The addition of benzyl alcohol acts as a preservative, preventing bacterial growth and allowing multiple withdrawals from the same vial

The practical recommendation is to choose a consistent time of day that fits your schedule