title: Structure-activity relationship in tryptophanyl-transfer ribonucleic acid synthetase from beef pancreas. Role of -SH groups in the activity of the enzyme.
mesh_terms: D000478:Alkylation; D000604:Amino Acyl-tRNA Synthetases / Q000378:metabolism*; D000818:Animals; D001665:Binding Sites; D002250:Carbon Radioisotopes; D002417:Cattle; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004355:Drug Stability; D004591:Electrophoresis, Polyacrylamide Gel; D005033:Ethylmaleimide; D007700:Kinetics; D008970:Molecular Weight; D010084:Oxidation-Reduction; D010179:Pancreas / Q000201:enzymology*; D010761:Phosphorus Radioisotopes; D011485:Protein Binding; D011487:Protein Conformation; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship; D013438:Sulfhydryl Compounds / Q000032:analysis; D013997:Time Factors; D014364:Tryptophan
chemical_list: D002250:Carbon Radioisotopes; D010761:Phosphorus Radioisotopes; D013438:Sulfhydryl Compounds; D014364:Tryptophan; D000604:Amino Acyl-tRNA Synthetases; D005033:Ethylmaleimide