Amino-dPEG?12-Tris(m-dPEG?24)3, product number QBD-11474, is a carboxylate-reactive, methyl-terminated, four-arm monodispersed PEG product designed to modulate the pharmacokinetics (PK) and biodistribution (BD) of conjugates. It can also be used in surface passivation of organic, inorganic, and biomolecular surfaces. Tris forms the core of the molecule. Three equal-length (76 atoms) methyl-terminated long arms plus one shorter (40 atoms) maleimido-terminated arm extend from the tris core. The total length of the product from the reactive amine to each of the terminal methyl groups is 121 atoms (99.8 ?).nThe terminal primary amine reacts with carboxylic acids (carboxylates) and their active esters (e.g., NHS esters, TFP esters) to form stable amide bonds. The terminal amine also reacts with aldehydes to form a labile Schiff base that can be reduced to a stable secondary amine under mild conditions. The uncharged terminal methyl groups may alter the overall charge of the conjugate molecule.nThe amphiphilic dPEG? construct imparts hydrophilicity to conjugates, reduces or eliminates the conjugates’ antigenicity, and increases the hydrodynamic volume of conjugated molecules. With increased hydrodynamic volume, the renal clearance of conjugate molecules is reduced or eliminated.nThis product is designed for modifying biomolecules like antibodies and antibody fragments but can be used in any bioconjugate application where free carboxylates or their active esters are available for reaction. Potential product applications include reducing or eradicating renal clearance, extending?in vivo?circulating half-life, and suppressing immune responses to conjugates. Amino-dPEG?12-Tris(m-dPEG?24)3, product number QBD-11474, can passivate organic, inorganic, or biomoecular surfces to prevent non-specific, hydrophobic interactions.
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Click Chemistry Tools(CCT)公司位于美國亞利桑那州斯科茨代爾(Scottsdale,AZ)。自公司成立以來,一致致力于不斷開發(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公司位于美國亞利桑那州斯科茨代爾(Scottsdale, AZ),自成立以來,一直致力于不斷開發(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目前上述三個品牌都已被被Vectorlabs收購并整合到Vectorlabs產(chǎn)品中