title: Role of tryptophan in dihydrofolate reductase.
mesh_terms: D001966:Bromine; D002384:Catalysis; D002942:Circular Dichroism; D003545:Cysteine / Q000032:analysis; D004229:Dithiothreitol; D004789:Enzyme Activation; D005493:Folic Acid Antagonists; D008433:Mathematics; D010084:Oxidation-Reduction; D013056:Spectrophotometry, Ultraviolet; D013291:Streptococcus / Q000201:enzymology*; D013388:Succinimides; D013762:Tetrahydrofolate Dehydrogenase / Q000032:analysis; D014364:Tryptophan / Q000032:analysis; D014466:Ultraviolet Rays
chemical_list: D005493:Folic Acid Antagonists; D013388:Succinimides; D014364:Tryptophan; D013762:Tetrahydrofolate Dehydrogenase; D003545:Cysteine; D001966:Bromine; D004229:Dithiothreitol