D-Luciferin is a substrate for the enzyme firefly luciferase. Chemiluminescence at 560 nm is generated when luciferin is oxidized by an ATP-dependent process, catalyzed by luciferase. Luciferase is encoded by the luc gene, which is widely used as a reporter gene in a variety of cells. Because of the intrinsic low background of chemiluminescence technique, detection of the luc gene expression can be made at very low level. In addition, luciferin/luciferase has been used to measure 10^-15 molar quantity of ATP. D-luciferin, sodium salt is a water-soluble form of D-luciferin.

• White solid soluble in water
• Store at -20°C and protect from light
• C₁₁H₇N₂NaO₃S₂.H₂O
• Mwt: 302.3
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