osslinkers are hydrophobic. Vector Laboratories' dPEG? crosslinking products are water-soluble, amphiphilic, single molecular weight PEG compounds with discrete chain lengths. These hydrophilic, non-immunogenic, dPEG? crosslinkers prevent the problems with aggregation that arise when using traditional, hydrophobic crosslinkers.nPublished studies have shown that TFP esters are more hydrolytically stable in aqueous buffers than N-hydroxysuccinimidyl (NHS) esters and are more reactive toward free amines. TFP esters react under the same conditions as NHS esters. However, the optimal pH range for TFP esters (7.5 – 8.0) is slightly higher than for NHS esters (7.0 – 7.5). Amide bond formation between the TFP-activated propionic acid group of MAL-dPEG?2-TFP ester and a free amine will be slightly slower at a suboptimal pH compared to the reaction rate within the optimum pH range.nThe maleimide end of MAL-dPEG?2-TFP ester, product number QBD-10549, reacts optimally with a sulfhydryl at pH 6.5 – 7.5. Conduct the conjugation at the lowest reasonable pH within this range. Above pH 7.5, free amines compete with free thiols at the maleimide reaction site, which may confound the data. Moreover, at higher pH values, the maleimide ring may open to form unreactive maleamic acid.nMAL-dPEG?2-TFP ester, product number QBD-10549, can be used the same way and in the same applications as the equivalent NHS esters. Possible uses for this product include the following:nCoating nanoparticle surfaces;nTethering antibodies to atomic force microscopy (AFM) probes;nConstructing antibody-drug conjugates (ADCs);nAdding flexibility and water solubility to a peptide;nIncreasing the water solubility and hydrodynamic volume of hydrophobic biomolecules;nBuilding supramolecular constructs; and,nConjugating the TFP ester end of the molecule a liposomal surface and then using the free maleimide end of the molecule to attach a small molecule drug, peptide, or antibody for targeted delivery of a diagnostic or therapeutic package.
產品形式
白色至類白色固體
保存建議
其他
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)和擴展一系列連接產品。他們利用特別新的研究成果研發(fā)生產出新穎的交聯(lián)和標記試劑。產品被廣泛用于藥物研發(fā)、癌癥治療以及各類診斷技術等。此外,CCT還可以提供個性化的定制產品,已滿足不同用戶的需求。目前CCT的產品線主要包括: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)產品。利用特別新的研究成果研發(fā)生產出各類新穎的交聯(lián)和標記試劑。其產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等領域。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品。代表產品有Classic Fluorescent Dyes, AZDye, Cyanine Dyes, IR Dyes, MB dyes以及一些標記試劑盒等。nQuanta Biodesign公司位于美國中部的俄亥俄州,成立于1997年。也是專注于生產研發(fā)各類標記產品的品牌之一。其研發(fā)的產品與dPEG技術相結合,生產出他們獨有的專利產品dPEG Building Blocks and Linkers,被廣泛用于細胞治療和分子診斷等研究領域。另外,還可為廣大科研工作者提供多種化學修飾試劑以及傳統(tǒng)Liner等。n目前上述三個品牌都已被被Vectorlabs收購并整合到Vectorlabs產品中