ICG-馬來酰亞胺，mal可以和蛋白、多肽、或抗體上的SH巰基反應連接

【資料簡介】

英文名：ICG maleimide

              ICG-MAL

               ICG-馬來酰亞胺

CAS：2143933-81-5

分子式:   C51H56N4O6S

分子量:   853.09

外 觀：綠色粉末

溶解度：二氯甲烷

純 度：95%+

結構式：

ICG is a tricarbocyanine-type dye with NIR-absorbing properties (peak absorption around 800 nm) and emission maximum at 807 nm (10% v/vDMSO/PBS). Little absorption in the visible range accounts for the low autofluorescence, tissue absorbance, and scattering at NIR wavelengths (700-900 nm).

The maleimide of the ICG dye offers the opportunity to develop optimal conjugates. Maleimide active group provides an efficient and convenient way to selectively link ICG dye to sulfhydryl groups (free thiol, R-SH) on various substrates (antibodies[1], peptides, proteins, oligonucleotides, small molecule drugs etc.) at neutral (physiological) pH without any activation. Maleimides have very low reactivity with amines, alcohols, and phenols (incl. tyrosine and histidine) and do not react with histidine and methionine thus providing very high labeling selectivity.

It has been reported that conjugation to some antibodies may cause decrease in fluorescence intensity of ICG bound to antibody due to the formation of H-dimers4. However, fluorescence is restored after cell binding and internalization, which can be used to design an activatable NIR fluorescent probe. Fluorescence intensity of the unbound ICG-antibody conjugate can be dramatically increased (up to 50-fold) by addition of SDS and β-mercaptoethanol, which diminishes π- π stacking5.

近紅外熒光染料Near IRDyes激發(fā)和發(fā)射波長和顏色圖：

ICG NHS ester的NHS可以和蛋白、多肽或抗體上面的NH2發(fā)生反應鏈接到一起。

ICG-maleimide的馬來酰亞胺可以和蛋白、多肽、小分子或抗體上的SH巰基反應連接。

ICG-Amine的NH2可以和蛋白、多肽小分子上面的NHS反應連接起來。

ICG和PEG鏈接可在體內(nèi)長循環(huán)。

• 西安凱新生物科技有限公司是國內(nèi)業(yè)PEG供應商，可以提供不同分子量的PEG衍生物，小分子PEG的循環(huán)節(jié)可以做到1-36個，高分子PEG分子量從1000-40000不等，可以修飾的基團有：氨基類，NHBOC類，F(xiàn)moc類，羧酸類，Mal類，NHS類，疊氮類，DBCO類，Cy3/Cy5/Cy7類，THP類，芐基類，丙炔基類，溴代類，丙酸叔丁酯類，乙酸叔丁酯類，甲基類，磺酸酯類，巰基類，產(chǎn)品純度高達98%以上，我公司憑借業(yè)的技術，誠信的經(jīng)營和不斷創(chuàng) 新的精神而發(fā)展壯大，在發(fā)展的同時不忘不斷總結不斷優(yōu)化為客戶的服務，視客戶取得成功為己任，力求將的產(chǎn)品、優(yōu) 質(zhì)的服務奉獻給我們的客戶。

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ICG衍生物產(chǎn)品：

ICG修飾蛋白類產(chǎn)品

ICG-Avidin

ICG-Streptavidin

ICG-BSA

ICG-Dextran

ICG-Alginate

ICG-Chitosan

ICG-Hyaluronic acid

ICG-Heparin

ICG-Ficoll

ICG-Cellulose

ICG-Concanavalin A

ICG-Transferrin

ICG-Polylysine

ICG NHS ester

ICG Vinylsulfone

ICG isothiocyanate

ICG Carboxlaic acid

ICG Maleimide

ICG amine

ICG thiol

ICG dichlorotriazine

ICG Hydrazide

ICG alkyne

ICG Avidin

ICG Biotin