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Phalloidin-iFluor® 532 Conjugate
This orange fluorescent phalloidin conjugate (equivalent to Alexa Fluor® 532-labeled phalloidin) selectively binds to F-actins. Used at nanomolar concentrations, phalloidin derivatives are convenient probes for labeling, identifying and quantitating F-actins in formaldehyde-fixed and permeabilized tissue sections, cell cultures or cell-free experiments. Phalloidin binds to actin filaments much more tightly than to actin monomers, leading to a decrease in the rate constant for the dissociation of actin subunits from filament ends, essentially stabilizing actin filaments through the prevention of filament depolymerization. Moreover, phalloidin is found to inhibit the ATP hydrolysis activity of F-actin. Phalloidin functions differently at various concentrations in cells. When introduced into the cytoplasm at low concentrations, phalloidin recruits the less polymerized forms of cytoplasmic actin as well as filamin into stable "islands" of aggregated actin polymers, yet it does not interfere with stress fibers, i.e. thick bundles of microfilaments. The property of phalloidin is a useful tool for investigating the distribution of F-actin in cells by labeling phalloidin with fluorescent analogs and using them to stain actin filaments for light microscopy. Fluorescent derivatives of phalloidin have turned out to be enormously useful in localizing actin filaments in living or fixed cells as well as for visualizing individual actin filaments in vitro. Fluorescent phalloidin derivatives have been used as an important tool in the study of actin networks at high resolution. AAT Bioquest offers a variety of fluorescent phalloidin derivatives with different colors for multicolor imaging applications.
<p>Fluorescence images of HeLa cells stained with Phalloidin-iFluor® 532 Conjugate using fluorescence microscope with a TRITC filter set (Red). Fixed cells were counterstained with Nuclear Green&trade; DCS1 (Cat#17550, Green).</p>
<p>Fluorescence images of HeLa cells stained with Phalloidin-iFluor® 532 Conjugate using fluorescence microscope with a TRITC filter set (Red). Fixed cells were counterstained with Nuclear Green&trade; DCS1 (Cat#17550, Green).</p>
protocol
Protocol
sds
SDS
COA
CatalogSize
Price
Quantity
23117300 Tests
Price
 
Physical properties
Molecular weight~1800
SolventDMSO
Spectral properties
Absorbance (nm)536
Correction factor (260 nm)0.26
Correction factor (280 nm)0.16
Extinction coefficient (cm -1 M -1)
90000
1
Excitation (nm)537
Emission (nm)560
Quantum yield
0.68
1
Storage, safety and handling
H-phraseH301, H311, H331
Hazard symbolT
Intended useResearch Use Only (RUO)
R-phraseR23, R24, R25
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12352200
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Page updated on October 9, 2024