The mixture was heated to 65 C for 5 min and quickly chilled on ice
The K m value for CDNB was obtained by reacting 0.5 g of purified e-GSTs of mammals with variable amounts of CDNB (from 0.05 to 2 mM) in the presence of 1 mM GSH, in 0.1 M potassium phosphate buffer, pH 6.5 (25 C)
A number of factors contribute: Different manufacturers use different stabilization/packaging processes (e.g., presence of excipients, vacuum sealing, desiccants)
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Inhibition of Tyrosinase: Glutathione is believed to inhibit the activity of an enzyme called tyrosinase
The provider matters more than the molecule: sterility, verified concentration, correct dosing, and supervision are what separate a clinical result from a gamble