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18846

Sigma-Aldrich

Atto 655 Phalloidin

suitable for fluorescence, ≥90.0% (sum of isomers, HPLC)

Synonyme(s) :

Atto 655 Phalloidin

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About This Item

Code UNSPSC :
12352108
Nomenclature NACRES :
NA.32

Niveau de qualité

100

Pureté

≥90.0% (sum of isomers, HPLC)

Forme

solid

Fabricant/nom de marque

ATTO-TEC GmbH

Transmittance

254 nm
655 nm

Fluorescence

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

Absorption UV

λ: 651- 657 nm Amax

Adéquation

suitable for fluorescence

Température de stockage

−20°C

Description générale

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.Phalloidin is a fungal toxin isolated from the poisonous mushroom Amanita phalloides. Its toxicity is attributed to the ability to bind F actin in liver and muscle cells. As a result of binding phalloidin, actin filaments become strongly stabilized. Phalloidin has been found to bind only to polymeric and oligomeric forms of actin, and not to monomeric actin. The dissociation constant of the actin-phalloidin complex has been determined to be on the order of 3 x 10–8. Phalloidin differs from amanitin in rapidity of action; at high dose levels, death of mice or rats occurs within 1 or 2 hours.

Application

Fluorescent conjugates of phalloidin, rhodamine-phalloidin staining reagents, such as Phalloidin–Atto 655 are used to label actin filaments for histological applications. Some structural features of phalloidin are required for the binding to actin. However, the side chain of amino acid 7 (g-dihydroxyleucine) is accessible for chemical modifications without appreciable loss of affinity for actin.

Informations légales

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

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

Certificats d'analyse (COA)

Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".

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Breaking the Diffraction Barrier in Fluorescence Microscopy by Optical Shelving.
Bretschneider, S.; Eggeling, Chr.; Hell, S. W.
Physical Review Letters, 98(21) (2007)
Gerlinde R Van de Walle et al.
Veterinary microbiology, 86(1-2), 51-57 (2002-03-13)
Addition of pseudorabies virus (PrV)-specific polyclonal immunoglobulins to PrV-infected monocytes induces internalization of plasma membrane anchored viral glycoproteins. This process may interfere with antibody-dependent cell lysis and resembles the well-studied physiological endocytosis process. A confocal study was designed to investigate
Ruth Barnard et al.
Cytometry. Part A : the journal of the International Society for Analytical Cytology, 73(4), 299-304 (2008-01-01)
Image-based screening, a new and flexible tool in the drug discovery cascade, is amenable to many different targets. This article describes a particular use of the Cellomics ArrayScan in developing a functional screen for histamine H(4) receptor (H(4)R) antagonists that
Rosangela Invernizzi et al.
Oncology, 75(3-4), 237-244 (2008-10-16)
Pegfilgrastim is a covalent conjugate of filgrastim and polyethylene glycol that has proved to be effective in supporting myelopoiesis during chemotherapy. Since very limited information is available on the biological effects of pegfilgrastim on neutrophils exposed to chemotherapy, we analyzed
Limin Li et al.
JCI insight, 5 (2019-03-20)
High autophagic activity in podocytes, terminally differentiated cells which serve as main components of the kidney filtration barrier, is essential for podocyte survival under various challenges. How podocytes maintain such a high level of autophagy, however, remains unclear. Here we
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