title: The spectrophotometric determination of uroporphyrinogen I synthetase activity.
abstract: A simple spectrophotometric method for uroporphyrinogen I synthetase in erythrocytes is described. Results obtained on intermittent acute porphyria patients and carriers are similar to the results obtained with fluorimetric methods. Reproducibility, relationship between enzyme activity and enzyme concentration, and effect of time on enzymatic activity are described.
mesh_terms: D000642:Ammonia-Lyases / Q000097:blood*; D004912:Erythrocytes / Q000201:enzymology; D006801:Humans; D011163:Hydroxymethylbilane Synthase / Q000097:blood*; D007700:Kinetics; D013050:Spectrometry, Fluorescence / Q000379:methods; D013053:Spectrophotometry / Q000379:methods
chemical_list: D011163:Hydroxymethylbilane Synthase; D000642:Ammonia-Lyases