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SQ Dyes (Reactive Quenchers)

SQ Dyes are non-fluorescent quenchers for labeling of proteins, peptides and amino-modified oligonucleotids. These reactive quenchers are suitable as non-fluorescent acceptors in combination with a wide range of fluorescent donors in FRET based applications. Specific donor-acceptor pairs with these acceptors are listed under FRET applications. SQ-565, SQ-740 and SQ-780 are also available as maleimides.

Excitation Light Sources Characteristics
Product Number
(Specs Sheet)
Product Name
(Product Info)
Target Group 380 405 436 488 532 594 635 650 680 700 750 780 Medium λ abs
[nm]
ε
[M –1
cm–1]
Buy
             
K8-1649
K8-1649
SQ-740-NHS
SQ-740-NHS
NH2 PB 7.4 740 44000
K8-1902
K8-1902
SQ-565-NHS
SQ-565-NHS
NH2 Water 560 22000
K8-1922
K8-1922
SQ-780-NHS
SQ-780-NHS
NH2 MeOH 782 115000

Absorption spectrum of SQ-565 in water
Absorption spectrum of SQ-565 in water
Absorption spectrum of SQ-740 in water
Absorption spectrum of SQ-740 in water

Absorption spectrum of SQ-780 in water

Absorption spectrum of SQ-780 in water

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