Luciferase *Recombinant firefly*

This enzyme is a luciferase expressed from a cloned gene from the North American firefly (Photinus pyralis) that provides the reliability and dependability needed for performing research or producing kits using bioluminescence reagents to detect ATP or luciferin substrates. This recombinant enzyme can potentially eliminate the possibility of seasonal and regional variability that may be found in luciferase purified from natural sources.