BP Fluor 660 NHS Ester is a bright and photostable far-red dye that emits fluorescence at about 685 nm in the borderline spectral region between far-red and near-IR. Although the absorption maximum is at around 665 nm, this dye can be sufficiently excited by the 633 or 647 nm laser. It reacts with the amine group in antibody, proteins, peptides, amino-modified oligos, and other target molecules.
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