title: Equilibrium ligand binding assays using labeled substrates: nature of the errors introduced by radiochemical impurities.
mesh_terms: D004798:Enzymes / Q000378:metabolism*; D005069:Evaluation Studies as Topic; D007553:Isotope Labeling; D007700:Kinetics; D008024:Ligands; D008433:Mathematics; D008722:Methods; D011485:Protein Binding
chemical_list: D004798:Enzymes; D008024:Ligands