DusQ 3 NHS ester

Cat. # Quantity Price Lead time
23D20 5 mg –   in stock
43D20 25 mg $315 in stock
53D20 50 mg $580 in stock
63D20 100 mg $885 in stock
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DusQ 3 NHS ester is a dark, far-red nonfluorescent DusQ 3 derivative for labeling with the primary amines of proteins, modified oligonucleotides. The labeling with covalent amide bond occurs most efficiently at pH 7-9.

DusQ 3 is used as an acceptor for preparation of fluorogenic dual-labeled probes, for qPCR, sequencing and other fluorescence-quenched system applications.

Due to quenching range characterised as 620-730 nm DusQ 3 is useful as an acceptor in fluorescence resonance energy transfer (FRET) combined with far-red to near-IR emitting dyes such as Cyanine5, Cyanine5.5, AF 647.

Absorption spectrum of DusQ 3

Absorption spectrum of DusQ 3

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General properties

Appearance: dark powder
Molecular weight: 817.77
Molecular formula: C39H42N7O4
Solubility: good in DMF, DMSO
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate. Avoid prolonged exposure to light.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 657
ε, L⋅mol−1⋅cm−1: 45500
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