Source:http://linkedlifedata.com/resource/umls/id/C0024075
MSH: Enzymes that oxidize certain LUMINESCENT AGENTS to emit light (PHYSICAL LUMINESCENCE). The luciferases from different organisms have evolved differently so have different structures and substrates.,NCI: An enzyme first isolated from firefly tails that catalyzes the production of light in the reaction between luciferin and ATP. (On-line Medical Dictionary)