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93711

Sigma-Aldrich

Atto 655

BioReagent, suitable for fluorescence, ≥85% (HPLC)

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About This Item

MDL number:
MFCD03456136
UNSPSC Code:
12352116
PubChem Substance ID:
57653573
NACRES:
NA.32

product line

BioReagent

Assay

≥85% (HPLC)

form

powder

manufacturer/tradename

ATTO-TEC GmbH

transmittance

254 nm
655 nm

fluorescence

λex 655 nm; λem 680 nm in 0.1 M phosphate pH 7.0

λ

in ethanol (with 0.1% trifluoroacetic acid)

UV absorption

λ: 652-658 nm Amax

suitability

suitable for fluorescence

storage temp.

−20°C

InChI

1S/C27H33N3O6S/c1-4-29-9-5-7-17-11-20-24(13-22(17)29)36-25-14-23-19(12-21(25)28-20)18(16-37(33,34)35)15-27(2,3)30(23)10-6-8-26(31)32/h11-14,18H,4-10,15-16H2,1-3H3,(H-,31,32,33,34,35)

InChI key

FOYVTVSSAMSORJ-UHFFFAOYSA-N

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Application

Atto labels are designed for highest sensitivity applications. A unique combination of advantages makes them highly favorable tools for all kinds of labeling applications. Some of their properties make them specifically interesting for single molecule detection. Atto labels are based on rigid structures and do not show any cis-trans-isomerization, which lowers the brightness of signals and leads to environment dependency, e.g., spectral shifts by conjugation.
Atto 655 shows a molar extinction of 110,000 and QY of 30% in water (50% in ethanol). Decay time is 1.9 ns.

Other Notes

New red absorbing fluorescent dye with best signal-to-noise ratio and long fluorescence life-time. Useful as a biophysical probe for binding interactions.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Volker Buschmann et al.
Bioconjugate chemistry, 14(1), 195-204 (2003-01-16)
The spectroscopic characteristics (absorption, emission, and fluorescence lifetime) of 13 commercially available red-absorbing fluorescent dyes were studied under a variety of conditions. The dyes included in this study are Alexa647, ATTO655, ATTO680, Bodipy630/650, Cy5, Cy5.5, DiD, DY-630, DY-635, DY-640, DY-650
Eilon Sherman et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 12(3), 696-703 (2011-01-29)
Intramolecular dynamics in the denatured state of a protein are of importance for protein folding. Native-like contact formation within the ensemble of denatured conformations of a protein may guide its transformation towards the native conformation. The efficiency of folding is
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
Ruixue Zhu et al.
The journal of physical chemistry. B, 115(17), 5001-5007 (2011-04-12)
Atto655 has been widely used as an excellent probing dye through photoinduced electron transfer (PET) for biochemical processes in oligonucleotides or polypeptides. However, its photophysical properties in the presence of the quenchers guanosine and tryptophan have not been carefully studied.
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