61911

Sigma-Aldrich

Atto 520 azide

suitable for fluorescence

assay

≥80.0% (HPCE)

Quality Level

mol wt

Mw 681 g/mol

fluorescence

λex 516 nm; λem 545 nm±10 nm in PBS, pH 7.4

suitability

suitable for fluorescence

storage temp.

−20°C

General description

Atto 520 is a novel fluorescent label related to the well-known dye Rhodamine 6G. Characteristic features of the label are strong absorption, high fluorescence quantum yield, and high thermal and photo-stability. The dye is moderately hydrophilic. Above pH 7.0 the dye exists in an equilibrium with a colourless form (pseudobase). This is a reversible reaction, which does not interfere with the process of coupling to proteins etc. On lowering the pH absorption and fluorescence are restored fully. For details of coupling see our recommended labeling procedures The fluorescence is excited most efficiently in the range 510 - 535 nm. A suitable source of excitation is an Argon-Ion laser using the 514 nm line.
The azide modification is suitable for reactions with alkyne groups (Huisgen reaction - “Click Chemistry“).

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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

Certificate of Analysis
Certificate of Origin
Vladimir Mekler et al.
The Journal of biological chemistry, 286(1), 270-279 (2010-10-19)
Promoter recognition by RNA polymerase is a key point in gene expression and a target of regulation. Bacterial RNA polymerase binds promoters in the form of the holoenzyme, with the σ specificity subunit being primarily responsible for promoter recognition. Free...
Hee-Jin Jeong et al.
Biosensors & bioelectronics, 40(1), 17-23 (2012-07-17)
Protein phosphorylation is a key event in intracellular signal transduction, and fluorescent biosensor for the specific phosphorylation event in a target protein is considered highly useful as a tool of cellular biology and drug screening. Vimentin, the most abundant intermediate...
Manoj Kumbhakar et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 10(4), 629-633 (2009-01-30)
Complex dynamics of combined long-range fluorescence resonance energy transfer (FRET) and short-range electron transfer (ET) processes in a single double-stranded DNA (dsDNA) molecule (see figure) reveals that FRET remains almost unaltered in the presence of ET. Present systems also demonstrate...
Christopher A Teske et al.
The journal of physical chemistry. B, 109(28), 13811-13817 (2006-07-21)
Confocal laser scanning microscopy (CLSM) is being increasingly used for observing protein uptake in porous chromatography resins. Recent CLSM studies have revealed the possible existence of a nondiffusive protein transport mechanism. Observing protein uptake with CLSM requires labeling the protein...
Siddharth Nanguneri et al.
PloS one, 7(5), e38098-e38098 (2012-06-05)
Three-dimensional fluorescence imaging of thick tissue samples with near-molecular resolution remains a fundamental challenge in the life sciences. To tackle this, we developed tomoSTORM, an approach combining single-molecule localization-based super-resolution microscopy with array tomography of structurally intact brain tissue. Consecutive...

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