79286
Phalloidin–Atto 700
suitable for fluorescence, ≥90% (HPLC)
Synonym(s):
Atto 700–Phalloidin
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About This Item
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Quality Level
assay
≥90% (HPLC)
form
powder
manufacturer/tradename
ATTO-TEC GmbH
transmittance
254 nm
700 nm
fluorescence
λex 700 nm; λem 719 nm in 0.1 M phosphate pH 7.0
λ
in methanol
suitability
suitable for fluorescence
storage temp.
−20°C
General description
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. Fluorescent conjugates of phalloidin 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-d-dihydroxyleucine) is accessible for chemical modifications without appreciable loss of affinity for actin.
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Packaging
Legal Information
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
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