• 
  

• 详细信息：

• InSituCellDeathDetectionKit,Fluorescein 现货供应

  Kitforthedetectionandquantificationofapoptosis(programmedcelldeath)atthesingle-celllevel,basedonlabelingofDNAstrandbreaks(TUNELtechnology):Analysisbyfluorescencemicroscopyorflowcytometry

  Application

  Qualitativedetectionofapoptosisatthesingle-celllevelbyfluorescencemicroscopyandquantitativedetectionbyflowcytometry.

  Benefits

  ProductDescription

  Samplematerial: CellsinsUSPension,cytospinandcellsmearpreparations,adherentcellsgrownonslides,andfrozenandparaffin-embeddedtissuesections.

  BackgroundInformation

  WidelyusedmethodstodetermineapoptosisincludetheanalysisofthegenomicDNAbyagarose-gelelectrophoresisandDNAfragmentationassaysbasedon ³H-thymidineand,alternatively,5-Bromo-2-deoxy-uridine.Themethodsinvolvetheseparationoffragmented,lowmolecularweightDNAfromunfragmented,highmolecularweightDNAinagivencellpopulation.Thus,thesemethodsdonotprovideinformationaboutthefateofanindividualcellinagivencellpopulation,orparticularly,intissuesections.Alternatively,individualapoptoticcellsmaybemicroscopicallyrecognizedbecauseofthecharacteristicappearanceofnuclearchromatincondensationandfragmentation,butthismethodissubjectiveandlimitedtoarelativelynarrowtimewindowwhenthemorphologicalchangesareatamaximum.
  ThehallmarkofapoptosisisDNAdegradation,whichinearlystages,isselectivetotheinternucleosomalDNAlinkerregions.TheDNAcleavagemayyielddouble-strandedandsingle-strandedDNAbreaks(nicks).Bothtypesofbreakscanbedetectedbylabelingthefree3-OHterminiwithmodifiednucleotides(e.g., biotin-dUTP,DIG-dUTP,fluorescein-dUTP)inanenzymaticreaction.Theenzymeterminaldeoxynucleotidyltransferase(TdT)catalyzesthetemplate-independentpolymerizationofdeoxyribonucleotidestothe3-endofsingle-anddouble-strandedDNA.ThismethodhasalsobeentermedTUNEL(TdT-mediateddUTP-X nick end labeling).Alternatively,free3-OHgroupsmaybelabeledusingDNApolymerasesbythetemplate-dependentmechanismcallednicktranslation.However,theTUNELmethodisconsideredtobemoresensitiveandfaster.

  Contents

  Principle

  The InSitu CellDeathDetectionKitFluorescein isbasedonthedetectionofsingle-anddouble-strandedDNAbreaksthatoccurattheearlystagesofapoptosis.
  ApoptoticcellsarefixedandpermeABIlized.Subsequently,thecellsareincubatedwiththeTUNELreactionmixturethatcontainsTdTandfluorescein-dUTP.Duringthisincubationperiod,TdTcatalyzestheadditionoffluorescein-dUTPatfree3-OHgroupsinsingle-anddouble-strandedDNA.Afterwashing,thelabelincorporatedatthedamagedsitesoftheDNAisvisualizedbyflowcytometryand/orfluorescencemicroscopy.

• Sensitive: Thedirectlabelingprocedureusingfluorescein-dUTPreducesbackgroundlabeling

• Fast: Theuseoffluorescein-dUTPallowsanalysisofthesamplesdirectlyaftertheTUNELreaction

• Convenient: Nosecondarydetectionsystemrequired

• Accurate: Identificationofapoptosisatamolecularlevel(DNA-strandbreaks)andidentificationofcellsattheveryearlystagesofapoptosis

1. EnzymeSolution(TdT),5vials

2. LabelSolution(fluorescein-dUTP),5vials

• 
  

Roche

罗氏公司（Roche）致力于生命科学领域产品的开发，向用户提供优质的科研产品。在1998年收购德国宝灵曼（Boehringer Mannheim）公司后，产品涵盖了分子生物学，细胞学，免疫学，蛋白质组学，生物化学等多个研究领域，罗氏拥有PCR以及标记产品的全球专利，其DIG标记产品和细胞凋亡相关产品在业内享有极高的声誉。五十年来，罗氏应用科学部专注于生命科研领域产品的开发和推广，如今已经有超过2000种的科研产品在市场上销售，覆盖了生命科学研究领域的各个方面，为科研工作者提供完整的解决方案

Despite significant advances in modern medicine, social and economic factors make the need for innovative, new products in the diagnosis and treatment of disease greater than ever.Roche's resources are focused on two research-intensive businesses:pharmaceuticals and diagnostics.

Within these businesses, priority is placed in areas of significant unmet medical need where the expertise at Roche can make a difference. The goal is to develop new and improved drugs, diagnostic tests, and services offering significant benefits over existing options.For this reason, Roche invests heavily in research and development - 10 billion Swiss Francs in 2009 - and will continue to do so in future.

产品列表：