m-dPEG®12-NHS ester, product number QBD-10262, is a medium-length (38 atoms, 44.7 Å), methyl-terminated, discrete-chain-length polyethylene glycol (dPEG®) spacer functionalized with an N-hydroxysuccinimidyl (NHS) ester for reaction with amines.nNHS esters react optimally with free amines at pH 7.0 – 7.5. In aqueous media, the hydrolytic rate of the ester to the carboxylic acid increases with increasing pH. Reacting surface amines on biomolecules (e.g., proteins and peptides) with this uncharged, methyl-capped dPEG® spacer may alter the overall charge of the resulting conjugates. Many applications employ this m-dPEG®12-NHS ester. Published papers using this product include uses in:nvaccine development;ncell surface engineering;nmultimodal imaging;nstable antimicrobial, cytotoxic dendrimers;nnanoparticles for siRNA delivery;ncoating of nanoparticles, quantum dots, and carbon nanotubes;nPK and immunogenicity improvements for organophosphorus hydrolase;nPK and immunogenicity improvements for poly-L-lysine dendrimers used as drug delivery vehicles to tumors; and,npreventing enzyme aggregation.nm-dPEG®12-NHS ester, product number QBD-10262, is just one member of a comprehensive line of methyl-terminated dPEG® products, including dPEG® spacers containing 2 to 49 ethylene glycol units.
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Click Chemistry Tools(CCT)公司位于美国亚利桑那州斯科茨代尔(Scottsdale,AZ)。自公司成立以来,一致致力于不断开发和扩展一系列连接产品。他们利用特别新的研究成果研发生产出新颖的交联和标记试剂。产品被广泛用于药物研发、癌症治疗以及各类诊断技术等。此外,CCT还可以提供个性化的定制产品,已满足不同用户的需求。目前CCT的产品线主要包括:Azides(Biotin-Azides)试剂、Bis-sulfone交联试剂、DBCO试剂、TCO试剂、Terminal Alkyne试剂、Tetrazine试剂、标记试剂盒以及分选用底物等。nFluoroprobes公司位于美国亚利桑那州斯科茨代尔(Scottsdale, AZ),自成立以来,一直致力于不断开发一系列的连接(linker)产品。利用特别新的研究成果研发生产出各类新颖的交联和标记试剂。其产品被广泛用于药物研发与筛选、疾病治疗方法和诊断技术等领域。此外,Fluoroprobes还可以根据客户的个性化需求提供各类定制连接产品。代表产品有Classic Fluorescent Dyes, AZDye, Cyanine Dyes, IR Dyes, MB dyes以及一些标记试剂盒等。nQuanta Biodesign公司位于美国中部的俄亥俄州,成立于1997年。也是专注于生产研发各类标记产品的品牌之一。其研发的产品与dPEG技术相结合,生产出他们独有的专利产品dPEG Building Blocks and Linkers,被广泛用于细胞治疗和分子诊断等研究领域。另外,还可为广大科研工作者提供多种化学修饰试剂以及传统Liner等。n目前上述三个品牌都已被被Vectorlabs收购并整合到Vectorlabs产品中