Firefly Luciferase mRNA (ARCA, 5mCTP, ψUTP) expresses luciferase protein which is initially extracted from firefly Photinus pyralis. The enzyme catalyzes ATP-dependent D-luciferin oxidation to yield oxyluciferin, a singlet-excited compound that emits light when returning to its ground state. Firefly Luciferase is a frequently used bioluminescent reporter for gene regulation and function study. It is applicable in assays for gene expression, cell viability and in vivo imaging etc. Our Firefly Luciferase mRNA is provided at a concentration of 1mg/ml, it is ARCA capped, polyA-tailed and incorporated with modified nucleotides. The capping of ARCA (anti-reverse cap analog) ensures high translation efficacy, while the addition of 5mCTP/ψUTP and poly(A) tail reduces host cell immune response and enhance mRNA stability.