SY-21 NHS Ester is a nonfluorescent dye used in FRET applications, with a quenching range from 580-680 nm . It reacts quickly with primary amines to form stable bonds, making it ideal for labeling proteins, peptides, and oligonucleotides. Perfect for bioconjugation , imaging , and diagnostic research.
Fluorescent Dye > Quenchers > SY-21
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