BDP 564/570 NHS ester is a hydrophobic fluorophore with a NHS ester. The NHS ester can react specifically and efficiently with primary amines such as the side chain of lysine residue or aminosilane-coated surfaces at neutral or slight basic conditions to form a covalent bond. BDP 564/570 NHS ester can be used for the labeling of lipids, oligonucleotides, peptides, and many other large and small molecules. Reagent grade, for research use only.