Product Description: Sulfo-QSY21-NHS is a fluorescent dye, which contains a NHS group that can react with amine groups (-NH2) in proteins or other molecules to form stable amide bonds. Sulfo-QSY21-NHS can be used in the synthesis of activity-based probes (ABPs)[1].
Formula: C45H39ClN4O13S3
References: [1]Edgington-Mitchell LE, et al., Live Cell Imaging and Profiling of Cysteine Cathepsin Activity Using a Quenched Activity-Based Probe. Methods Mol Biol. 2017;1491:145-159.