IRDye QC-1 Non-fluorescent Quencher Dye

The first non-fluorescent (dark) quencher, compatible with a wide range of visible and near-infrared fluorophores (~500 – 800 nm).

• Used for FRET (fluorescence resonance energy transfer) applications such as protease assays
• Efficient non-fluorescent quenching of near-infrared (NIR) dyes
• Caspase-3 Protease Assay substrate
• Widest available quenching range – no need to carefully match the donor's fluorescence spectrum with the acceptor's absorbance
• Pair IRDye QC-1 with any visible or near-infrared fluorophore within its wide wavelength range
• Quenches common fluorophores with >97% efficiency