Identification of GR and TrxR systems in Setaria cervi: Purification and characterization of glutathione reductase ScienceDirect Glutathione Reductase ammonium sulfate suspension, main 100 300units mg protein biuret 9001 48 3 Glutathione Reductase buffered aqueous solution, = 10units mg protein, Escherichia coli 9001 48 3 Frontiers Assigning function to active site residues of Schistosoma mansoni thioredoxin glutathione reductase from analysis of transient state reductive half reactions with variant forms of the enzyme