SRE0045
Luciferase from Photinus pyralis (firefly)
recombinant, expressed in E. coli, lyophilized powder, ≥10×1010 units/mg protein
Synonyme(s) :
Luciferase firefly
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About This Item
Numéro CAS:
Numéro MDL:
Code UNSPSC :
12352204
Nomenclature NACRES :
NA.54
Produits recommandés
Produit recombinant
expressed in E. coli
Niveau de qualité
Forme
lyophilized powder
Activité spécifique
≥10×1010 units/mg protein
Poids mol.
62 kDa
Application(s)
diagnostic assay manufacturing
Température de stockage
−20°C
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Catégories apparentées
Application
Firefly luciferase is used extensively in molecular and cell biology, in particular for the efficient detection and quantitation of ATP and as a reporter for genetic function.
Actions biochimiques/physiologiques
Firefly luciferase is a 62 kDa protein that catalyzes the production of light. The enzyme requires ATP, molecular oxygen, and the heterocyclic compound, firefly luciferin, to generate light in a two-step process. The light producing reaction is initiated by luciferin activation (adenylation of its carboxylate group) and proceeds in the presence of molecular oxygen to yield a photon of yellow-green light.
Définition de l'unité
One luciferase enzyme unit will produce one Relative Light Unit (RLU) at 20-25 °C over a 10 second period, measured in 100 μl assay mixture containing 40 pmol ATP and 15 nmol luciferin in Tris-glycine buffer, pH 7.6, using a GloMax 20/20 Luminometer.
Unit Definition Conversion Factor: There are approximately 9000 Relative Light Units (RLU) per one traditional Light Unit that uses a peak height equivalent to 0.02 μCi of 14C in a PPO/POPOP cocktail.
Unit Definition Conversion Factor: There are approximately 9000 Relative Light Units (RLU) per one traditional Light Unit that uses a peak height equivalent to 0.02 μCi of 14C in a PPO/POPOP cocktail.
Forme physique
Supplied as a lyophilized powder containing HEPES, pH 7.5, NaCl, MgCl2, EDTA, DTT and a carbohydrate stabilizer.
This product is a recombinant luciferase (62 kDa) from Photinus pyralis (American firefly) produced from the luc gene expressed in E. coli.
Notes préparatoires
To obtain maximal solubility it is important to reconstitute the enzyme at a high salt concentration, such as 1 M Tris buffer with any counter ion at pH 7-8. The enzyme can be prepared at a concentration of up to 5 mg protein/ml. Do not vortex and avoid agitation.
After reconstitution, the enzyme solutions can kept at 4-8 °C for up to 2 days or frozen in working aliquots at -20°C for at least one month. Repeated freezing and thawing is not recommended.
After reconstitution, the enzyme solutions can kept at 4-8 °C for up to 2 days or frozen in working aliquots at -20°C for at least one month. Repeated freezing and thawing is not recommended.
Substrat
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Eye Dam. 1 - Resp. Sens. 1
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Certificats d'analyse (COA)
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Journal of bioluminescence and chemiluminescence, 7(3), 185-193 (1992-07-01)
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Articles
Firefly luciferase is a sensitive reporter for gene studies due to its absence in mammalian cells or tissues.
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