Azido-dPEG?8-NHS ester, product number QBD-10503, is a water-soluble click chemistry crosslinker containing an azide group linked to an N-hydroxysuccinimidyl (NHS) ester through a single molecular weight, discrete polyethylene glycol (dPEG?) spacer. Azido-dPEG?8-NHS ester works with copper(I)-catalyzed, ruthenium-catalyzed and with copper-free (e.g., strain-promoted) click chemistry. The dPEG? spacer imparts water solubility and adds hydrodynamic volume to the conjugated product. The single molecular weight product design, with its discrete chain length, simplifies the analysis of this product.nOur single molecular weight, discrete chain length PEG (dPEG?) products are a superior alternative to traditional polyethylene glycol products. Conventional PEGylation reagents consist of a complex mixture of different chain lengths due to the polymerization processes that form them. In contrast, each dPEG? product contains a discrete chain length of PEG with only one molecular weight. Conjugates made with dPEG? products have less complicated analyses compared to conjugates prepared with traditional PEGylation reagents.nNHS esters are the most popular, most widely used way to conjugate carboxylic acids to primary or secondary amines resulting in stable amide bonds. NHS esters react quickly and efficiently in aqueous media at physiological pH values (7.0 – 7.5). However, they are prone to hydrolysis at a rate that is pH-dependent. Published research shows that 2,3,5,6-tetrafluorophenyl (TFP) esters are more hydrolytically stable and have better reactivity with amines than NHS esters.
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無(wú)色至淡黃色液體
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Click Chemistry Tools(CCT)公司位于美國(guó)亞利桑那州斯科茨代爾(Scottsdale,AZ)。自公司成立以來(lái),一致致力于不斷開(kāi)發(fā)和擴(kuò)展一系列連接產(chǎn)品。他們利用特別新的研究成果研發(fā)生產(chǎn)出新穎的交聯(lián)和標(biāo)記試劑。產(chǎn)品被廣泛用于藥物研發(fā)、癌癥治療以及各類診斷技術(shù)等。此外,CCT還可以提供個(gè)性化的定制產(chǎn)品,已滿足不同用戶的需求。目前CCT的產(chǎn)品線主要包括:Azides(Biotin-Azides)試劑、Bis-sulfone交聯(lián)試劑、DBCO試劑、TCO試劑、Terminal Alkyne試劑、Tetrazine試劑、標(biāo)記試劑盒以及分選用底物等。nFluoroprobes公司位于美國(guó)亞利桑那州斯科茨代爾(Scottsdale, AZ),自成立以來(lái),一直致力于不斷開(kāi)發(fā)一系列的連接(linker)產(chǎn)品。利用特別新的研究成果研發(fā)生產(chǎn)出各類新穎的交聯(lián)和標(biāo)記試劑。其產(chǎn)品被廣泛用于藥物研發(fā)與篩選、疾病治療方法和診斷技術(shù)等領(lǐng)域。此外,F(xiàn)luoroprobes還可以根據(jù)客戶的個(gè)性化需求提供各類定制連接產(chǎn)品。代表產(chǎn)品有Classic Fluorescent Dyes, AZDye, Cyanine Dyes, IR Dyes, MB dyes以及一些標(biāo)記試劑盒等。nQuanta Biodesign公司位于美國(guó)中部的俄亥俄州,成立于1997年。也是專注于生產(chǎn)研發(fā)各類標(biāo)記產(chǎn)品的品牌之一。其研發(fā)的產(chǎn)品與dPEG技術(shù)相結(jié)合,生產(chǎn)出他們獨(dú)有的專利產(chǎn)品dPEG Building Blocks and Linkers,被廣泛用于細(xì)胞治療和分子診斷等研究領(lǐng)域。另外,還可為廣大科研工作者提供多種化學(xué)修飾試劑以及傳統(tǒng)Liner等。n目前上述三個(gè)品牌都已被被Vectorlabs收購(gòu)并整合到Vectorlabs產(chǎn)品中