Product Description: QSY 21 NHS, a dark quencher is an efficient energy transfer acceptor of the far red and NIR fluorescent probes. QSY 21 NHS works inthe wavelength range of 540-750 nm, and is frequently used in FRET applications. QSY 21 NHS does not emit fluorescence in normal conditions. NHS esters can be used to label the primary amines (R-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules[1].
Formula: C45H39ClN4O7S
References: [1]Kabelác M, et al. A comparative study of the binding of QSY 21 and Rhodamine 6G fluorescence probes to DNA: structure and dynamics. Phys Chem Chem Phys. 2010 Sep 7;12(33):9677-84.
CAS Number: 304014-13-9
Molecular Weight: 815.33
Research Area: Others
Target: Fluorescent Dye