• Conjugation of SiR-COOH dye to proteins or peptides
• Conjugation of SiR-COOH dye to oligonucleotides or small molecules

SiR-COOH is the 6-carboxylic acid form of SiR dye (Ab: 652, Em: 674). The carboxylic acid group facilitates EDC/NHS activation or other amide bond forming chemistries for labeling proteins, peptides or amine-bearing molecules

Key features

• Ab: 652 nm, Em: 674 nm – far-red spectrum
• Emission in far-red minimizes phototoxicity and sample autofluorescence
• High extinction coefficient
• High photostability
• Compatible with widefield, confocal, STED and SIM microscopy