73948

Sigma-Aldrich

Atto 655 iodoacetamide

suitable for fluorescence

NACRES:
NA.32

fluorescence

λex 663 nm; λem 684 nm in 0.1 M phosphate pH 7.0

Quality Level

suitability

corresponds for coupling to thiols
suitable for fluorescence

storage temp.

−20°C

General description

Atto 655 belongs to a new generation of fluorescent labels. The dye is designed for application in the area of life science, e.g. labeling of DNA, RNA or proteins. Characteristic features of the label are strong absorption, good fluorescence quantum yield, excellent thermal and photo-stability, outstanding ozone resistance, very good water solubility, and very little triplet formation. Atto 655 is a zwitterionic dye with a net electrical charge of zero. The fluorescence is efficiently quenched by electron donors like guanine, tryptophan, etc.
The iodoacetamide derivative reacts, like the maleimide, with a sulfhydryl group forming a thioether bond. It is predominantly used for tagging cystein residues of proteins.

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Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Legal Information

This product is for Research use only. In case of intended commercialization, please contact the IP-holder (ATTO-TEC GmbH, Germany) for licensing.

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Bengang Xing et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 17(50), 14170-14177 (2011-11-16)
The molecular interactions of the glycopeptide antibiotic vancomycin (Van) with bacterial cell wall analogues N,N'-diacetyl-L-Lys-D-Ala-D-Ala (Ac(2) KdAdA) and N,N'-diacetyl-L-Lys-D-Ala-D-Lac (Ac(2) KdAdL) were investigated in neat water, phosphate buffer and HEPES buffer by using fluorescence correlation spectroscopy (FCS) and molecular dynamics...
Achim Friedrich et al.
FEBS letters, 581(8), 1644-1648 (2007-04-03)
This article presents a new, highly sensitive method for the identification of single nucleotide polymorphisms (SNPs) in homogeneous solutions using fluorescently labeled hairpin-structured oligonucleotides (smart probes) and fluorescence single-molecule spectroscopy. While the hairpin probe is closed, fluorescence intensity is quenched...
Søren Preus et al.
Chembiochem : a European journal of chemical biology, 13(14), 1990-2001 (2012-09-01)
Förster resonance energy transfer (FRET) is a powerful tool for monitoring molecular distances and interactions at the nanoscale level. The strong dependence of transfer efficiency on probe separation makes FRET perfectly suited for "on/off" experiments. To use FRET to obtain...
Julie M G Rogers et al.
Langmuir : the ACS journal of surfaces and colloids, 27(7), 3815-3821 (2011-03-16)
The structure and function of the influenza A M2 proton channel have been the subject of intensive investigations in recent years because of their critical role in the life cycle of the influenza virus. Using a truncated version of the...
Ana J García-Sáez et al.
The Journal of biological chemistry, 286(43), 37768-37777 (2011-09-03)
Pore-forming toxins have evolved to induce membrane injury by formation of pores in the target cell that alter ion homeostasis and lead to cell death. Many pore-forming toxins use cholesterol, sphingolipids, or other raft components as receptors. However, the role...

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