Inthissection,youwillfindtechniquesrelatedtooligonucleotides,suchasoligopurificationbyacrylamidegel,annealingtwooligostomakedoublestrandedDNAandvisualizationbyUVshadowingandmore... Basics ·ResuspendingLyophilizedOligos(IDT) ·Preparationofoligonucleotideprimers(GSC)Prepareworkingprimersolutionfromcommercialsynthesizedoligos ·StorageandHandling(Genosys)Properstorageofyouroligonucleotidewillmaximizeitsshelf-life,allowingyoutogetthemostusefromyouroligo.Followingthesesimpledilutionandweight/volumeunitconversionguidelineswillenableyoutoworkeasilywithyourGenosysoligos. AnnealingofOligos ·AnnealTwoOligostoMakeDouble-StrandedDNA(IDT)ItissometimesnecessarytomakedoublestrandedDNAfromsinglestrandedoligos.Whiletheannealingprocedureisverysimple,attentiontoafewdetailscangreatlyreducethepresenceofundesiredsinglestrandedmaterial. ·AnnealOligonucleotidestoMakeDouble-StrandedDNA(Genosys) ·ProtocolforAdapterProduction(LTI)Annealtwooligostomakeadaptor OligoVisualization ·OligonucleotideVisualizationVisualizeoligosbyUVshadowingormethylenebluestaining ·UVShadowing(Ambion)UVshadowingisatechniqueforvisualizingnucleicacids,e.g.separatedinagel,usingshort-waveUVlight(254nm)andafluor-coatedTLCplate.ThismethodisforidentifyingnonisotopicprobesorunlabeledRNA(e.g.formicroinjection)duringgelpurificationsincetheotheralternativeofstainingwithEtBroracridineorangerequiressubsequentextractionofthedye.However,thismethodcanbeusedtovisualizeanynucleicacidpresentinsufficientamount(>0.3µg). OligoPurification ·OligoPurificationonAcrylamideGels(PMCIResearch) ·IsolationofDNAfromAcrylamideGels(SchimentiLab) ·PAGEPurificationofOligonucleotides(LTI)ProtocolforPAGEPurificationofOligonucleotidesProtocolforPAGEPurificationofOligonucleotidesOligonucleotidescontaminatedbysignificantamountsofabortedsynthesisproducts(e.g.,n-1,... ·Oligonucleotidepurification(FrankBottoneJr.)Buanolprecipitationmethod ·ButanolPrecipitationofDeprotectedOligonucleotides(PMCIResearch)Crudeoligonucleotidescanbeprecipitatedafterdeprotectiondirectlyfromtheammoniasolutionwithouttheneedforaseparatesteptoremovetheammonia.Thisprocedureremovessmallmolecularweightimpuritiessuchastheammoniaitselfandthebyproductsofdeprotection(benzamide,isobutyramide). OligoLabeling ·LabelingofOligonucleotides(PMCIResearch)Labeloligowithpolynucleotidekinase. ·Alkalinephosphataselabelingofoligos(Promega)Providesusefulguideforpreparingphosphataseconjugatedoligos ·5-EndOligoFluorescenceLabeling(AmershamPharmacia)Labelingofoligonucleotideswithasinglefluoresceinresidueatthe5end ·5endlabelingofoligonucleotideswithgamma-32P-ATP(PetraKlaff)Labelingandpurificationmethodingreatdetail OligoQuantitation,ConversionsandCalculations ·MicrogramsofDouble-StrandedDNAtoPicomoles(Promega) ·PicomolesofDouble-StrandedDNAtoMicrogramsandNanograms(Promega) ·MicrogramsperMilliliterofOligonucleotides(Single-StrandedDNA)topicomolespermicroliter(Promega) ·PicomolesperMicroliterofOligonucleotides(Single-StrandedDNA)tomicrogramspermilliliter(Promega) ·MicrogramsofLinearDNAtoPicomolesofEnds(Promega) ·MolarRatioofInserttoVectorforLigations(Promega) ·ConversionFactorsforMetricPrefixes(Promega) ·OligonucleotideMeltingTemperatureCalculations(Promega) ·QuantitationofOligonucleotides(IDT)QuantitateyouroligobyUVSpectrophotometryorpolyacrylamidegel ·QuantitationofOligonucleotides(Genosys)UVQuantitation ·CalculationofMeltingTemperature(Genosys) OligonucleotideCalculatorDetermineTm,MW,etc.ofyouroligonucleotide(requiresjavascriptenabled