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1、磷酸化的DNABiotin-DNA炔基修饰的DNA巯基修饰的DNA氨基修饰的DNA金银纳米颗粒碳纳米管、石墨烯二氧化硅纳米颗粒量子点上转换纳米颗粒磷酸化的DNA与TiO2-堆积,如单链DNA与石墨烯,碳纳米管静电吸附1、Biotin-DNA2、炔基修饰的DNA及其他生物分子3、NH2-DNA氨基 羧基氨基 羧基氨基 氨基1)EDC和NHSFor best results in two-step reactions,perform the first reaction in MES buffer(or other non-amine,non-carboxylate buffer)at pH 5-
2、6,then raise the pH to 7.2-7.5 with phosphate buffer(or other non-amine buffer)immediately before reaction to the amine-containing molecule氨基 羧基DCC(N,N-Dicyclohexylcarbodiimide)氨基-氨基1)BS(PEG)n PEG Crosslinkers-Amine Reactive 2)TSAT(Tris-succinimidyl aminotriacetate)WaterWaterNHS esters:pH 7-93)DSS(d
3、isuccinimidyl suberate)4)BSOCOES(bis2-(succinimidyloxycarbonyloxy)ethylsulfone)5)DSG(disuccinimidyl glutarate)6)DTSSP(3,3-Dithiobissulfosuccinimidylpropionate)WaterWaterWaterDMSO or DMF8)BS(Bissulfosuccinimidyl suberate)9)EGS ethylene glycolbis(succinimidylsuccinate)10)Sulfo-EGS ethylene glycolbis(s
4、ulfosuccinimidylsuccinate)7)DST(disuccinimidyl tartrate)WaterWaterDMSO or DMFDMSO or DMF4、巯基化的DNA1 Au-S Ag-S2 巯基 氨基3 巯基 羧基4 巯基 羟基5 巯基 巯基巯基-氨基1)AMAS(N-maleimidoacetoxy succinimide ester)NHS esters:pH 7-9;。Two steps reactionDMSO or DMF2)BMPS(N-maleimidopropyloxy succinimide ester)DMSO or DMF3)EMCS(N-m
5、aleimidocaproyloxysuccinimide ester)DMSO or DMF4)Sulfo-EMCS(N-maleimidocaproyloxysulfosuccinimide ester)Water6)Sulfo-GMBS(N-maleimidobutyryloxysulfosuccinimide ester)5)GMBS(N-maleimidobutyryloxysuccinimide ester)DMSO or DMFWater7)BMPA(N-maleimidopropionic acid)EDC,8)LC-SMCC(Succinimidyl-4-N-maleimid
6、omethylcyclohexane-1-carboxy-6-amidocaproate)DMSO or DMF10)Sulfo-SMPB(sulfosuccinimidyl 4-p-maleimidophenylbutyrate)9)SMPB(succinimidyl 4-p-maleimidophenylbutyrate)DMSO or DMFWater11)Sulfo-LC-SPDP,LC-SPDP,SPDP巯基-羧基巯基-羟基异氰酸脂在水溶液中很容易水解,所以最好用有机溶剂如DMSO、DMF等。如在水相中,则要使用pH8.5的碱性缓冲溶液的碱性缓冲溶液,避免使用含羟基避免使用含羟基的缓冲液如tris缓冲液,且要注意含羟基的分子不能有氨基和巯基含羟基的分子不能有氨基和巯基,因为pH7.5顺丁烯二酰亚胺失去对巯基的特异性,会同时与氨基和巯基发生反应。巯基-巯基表征:1、定性(红外表征,如交联剂的特征峰;测颗粒的在260纳米处的紫外吸收,跑电泳,电位,粒径变化)2、定量(测颗粒或上清的紫外吸收,荧光,热重力分析)