Letter: Modification of firefly luciferase with a luciferin analog.  A red light producing enzyme.
D000478:Alkylation; D000818:Animals; D001517:Coleoptera; D049454:Firefly Luciferin / Q000031:analogs & derivatives*; D008027:Light; D008156:Luciferases / Q000037:antagonists & inhibitors
D049454:Firefly Luciferin; D008156:Luciferases