The present invention provides industrially useful luciferase. Mutant luciferase of the invention is produced by culturing a microorganism belonging to the genus Escherichia which harbors a recombinant DNA containing the mutant luciferase gene of a firefly. Mutant luciferase can produce red, orange or...http://www.google.es/patents/US5330906?utm_source=gb-gplus-sharePatente US5330906 - Mutant luciferase of a firefly
