DescriptionLeavesomefeedback!     TestedandCertifiedforinvivoimaging(See"LuciferinFAQ"inadditionalinformation)Luciferinisacommonbioluminescentreporterusedforinvivoimagingoftheexpressionofluciferase.ThiswatersolublesubstrateforthefireflyluciferaseenzymeutilizesATPandMg2+ascofactorstoemitacharacteristicyellow-greenemissioninthepresenceofoxygen,whichshiftstoredlightinvivoat37°C.ThroughtheutilizationofATP,thereactioncanbefurtherusedtoindicatethepresenceofenergyorlifeinordertofunctionasalife-deathstain.Luciferinisacommonreagentusedthroughoutthebiotechnologyfieldandspecificallyforinvivoimaging.Luciferaselabeledtumorcells,stemcellsorinfectiousdiseasesareofteninoculatedintoresearchanimalssuchasratsormiceforinvestigation.Theinjectionofluciferinallowsforthereal-time,noninvasivemonitoringofdiseaseprogressionand/ordrugefficacyinthesemodelsystemsthroughBioluminescenceImaging(BLI).Luciferinisalsocommonlyusedforinvitroresearch,includingluciferaseandATPassays,genereporterassays,highthroughputsequencingandvariouscontaminationassays.FireflyLuciferinisidenticaltoBeetleLuciferin.(See"AdditionalInformation"forstructures.)ProductSpecifications:D-Luciferin,PotassiumSalt,4,5-Dihydro-2-(6-hydroxy-2-benzothiazolyl)-4-thiazolecarboxylicacidpotassiumsalt,MOLECULARBIOLOGYGRADE(PremiumPure)Formula:KC11H7N2O3S2MW:318.42g/molColor:LightyellowpowderPurity:>99%pure.(QualityverifiedbynineindependentcriteriaincludingHPLCandFTIR.)Storage/Handling:Storedesiccatedat-20°C.Protectfromlight.PubChemChemicalID:44134804

★活体技术荧光检测荧光蛋白标记适用于标记细胞、病毒、基因等，通常使用的是 GFP、EGFP、RFP（DsRed）等；荧光染料标记适用于标记抗体、多肽、小分子药物等；常用的有 Cy3、Cy5、Cy5.5 及 Cy7量子点标记（新的标记方法）适用于标记肿瘤，主要应用在活细胞实时动态荧光观察与成像；量子点（quantum dot) 是一种能发射荧光的半导体纳米微晶体，外观恰似一极小的点状物。量子点荧光比有机荧光染料的发射光强的 20 倍，稳定性强 100 倍以上，具有荧光发光光谱较窄、量子产率高、不易漂白、激发光谱宽、颜色可调，并且光化学稳定性高，不易分解等诸多优点。