MB 633 NHS Ester is a fluroescent agent with a terminal NHS ester group. It is a very hydrophilic, water-soluble, far-red fluorescent dye that has a maximal absorption of 630 nm and emission at 650 nm. The NHS ester can be applied to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.
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