Coelenterazine cp is a synthetic derivative of coelenterazine. Its aequorin complex generates luminescence intensity 15 times higher and has a faster response time to calcium compared to native coelenterazine.Coelenterazines are luminescent enzyme substrates for apoaequorin and Renilla luciferase. Apoaequorin is used as a calcium indicator. It binds coelenterazine to form an aequorin complex that emits light upon calcium binding and measures concentrations ~0.1 uM to >100 uM. Renilla luciferase is widely used as a reporter of transcription regulation and as a donor in bioluminescence resonance energy transfer (BRET) to study protein-protein interactions. Coelenterazines are also used for chemiluminescent detection of superoxide anions and peroxynitrite in cells or tissues. Coelentrazine analogs and water-soluble Aquaphile™ Coelenterazines are also available.Properties : Yellow solid soluble in MeOH or EtOH; Store at -20°C, protect from light; C25H25N3O3; MW: 415.48.