水溶性CY7标记N-羟基琥珀酰亚胺酯Sulfo-Cyanine7 NHS ester 科研用
磺化Cy7水溶性极好,并且染料分子本身带电荷,标记到蛋白表面后不会引发疏水性蛋白聚集,提高荧光标记产物的稳定性。磺化Cy7-NHS也溶于甲醇,DMSO,DMF等有机溶剂,标记反应也可以在纯有机溶剂中进行。
Cy7染料是常用的近红外荧光染料,常被用于小动物活体成像,染料能够在深层组织产生信号,进而可以进行药物分子示踪。
此外由于其性质,Cy7避开了可见光区,在生物组织中的穿透深度较大。水和血红蛋白对700~900 nm的光吸收都很少,使得近红外光可以穿透组织内部多达15 cm。同时,这类染料还拥有紫外光区染料和同位素标记无法具备的生物安全性。

Sulfo-Cyanine7 is an improved analog of Cy7® fluorophore with quantum yield improved by 20%, and higher photostability. This fluorescent dye is especially useful for NIR imaging.
Near infrared fluorescent imaging takes advantage of transparency of biological tissues at particular range of wavelengths. The method is non-destructive, and allows to monitor distribution of various labeled molecules in live organisms.
ICG-DBCO
Sulfo-CY3 NHS ester
Sulfo-CY3.5 NHS ester
CY5 NHS ester
CY3 COOH
ICG-Hydrazide
Sulfo-CY3 maleimide
CY7.5 COOH
Sulfo-CY5.5 NHS ester
CY7 NHS ester
Sulfo-CY5 NHS ester
Sulfo-CY3.5 COOH
Sulfo-CY3 COOH
CY5 amine
以上资料源自https://www.stargraydye.com/portal/goods/list/id/1.html
星戈瑞stargraydye(2022.2)