MB 633 NHS Ester (FP-1771)

For many years, the cyanine-5 based dye (Cy™5 and more recently Alexa Fluor® 647) has been the dye of choice in far-red spectral window due to minimal autofluorescence in most biological samples in this spectral region allowing for extremely sensitive detection. In spite of recent improvement in cyanine-5 based dyes most dye are still lacks sufficient photostability required for many demanding applications.

MB 633 is a novel, rhodamine-based dye with its absorption peak at 630 nm. MB 633 can be optimally excited by the 633 nm He-Ne laser or the 635 nm red diode laser with emission maximum at 650 nm. The most important advantage of MB 633 and other rhodamine-based far-red MB dyes are their unmatched photostability. The combination of superior brightness and photostability makes far-red MB dyes ideal choices for detection in the long wavelength region on a variety of instruments