title: Affinity labeling of the active sites of delta  5 -ketosteroid isomerase using photoexcited natural ligands.
mesh_terms: D000085:Acetates; D000736:Androstenes; D001665:Binding Sites; D001667:Binding, Competitive; D002247:Carbon Isotopes; D002264:Carboxylic Acids; D003080:Cold Temperature; D004962:Estranes; D006914:Hydroxysteroids; D007535:Isomerases / Q000037:antagonists & inhibitors* / Q000528:radiation effects; D007664:Ketosteroids; D008738:Methyl Ethers; D008956:Models, Chemical; D010775:Photic Stimulation; D011284:Pregnenolone; D011549:Pseudomonas / Q000201:enzymology*; D013256:Steroids / Q000528:radiation effects; D013329:Structure-Activity Relationship; D013739:Testosterone; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D000085:Acetates; D000736:Androstenes; D002247:Carbon Isotopes; D002264:Carboxylic Acids; D004962:Estranes; D006914:Hydroxysteroids; D007664:Ketosteroids; D008738:Methyl Ethers; D013256:Steroids; D013739:Testosterone; D011284:Pregnenolone; D007535:Isomerases