title: Active site-directed addition of a small group to an enzyme: the ethylation of luciferin.
mesh_terms: D000345:Affinity Labels / Q000138:chemical synthesis* / Q000494:pharmacology; D001665:Binding Sites; D049454:Firefly Luciferin / Q000031:analogs & derivatives* / Q000494:pharmacology; D008722:Methods; D013329:Structure-Activity Relationship
chemical_list: D000345:Affinity Labels; D049454:Firefly Luciferin