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Phalloidin, Fluorescein Isothiocyanate Labeled

sequence Amanita phalloides(synthetic: peptide sequence)

Empirical Formula (Hill Notation):
Molecular Weight:
MDL number:

Quality Level

biological source

sequence from Amanita phalloides (synthetic: peptide sequence)




λex 495 nm; λem 520 nm(lit.)

storage temp.


General description

Phalloidin is a phallotoxin produced by death cap mushroom Amanita phalloides. It is a cyclic peptide, which interacts with actin and this was first identified in phalloidin-poisoned rats. It is a heptapeptide, cyclic in nature, with a crosslink between tryptophan at position 6 and cysteine at position 3. The side chain of amino acid 7 (γ-δ-dihydroxyleucine) in phalloidin, is accessible to modifications, through which fluorescently labelled phalloidin compounds can be produced.


Phalloidin, Fluorescein Isothiocyanate Labeled has been used:
  • To visualize F-Actin reorganization in primary neonatal cardiomyocytes (PNCMs) and H9C2 cells (rat cardiac myoblasts) following endothelin-1 (ET-1) and angiotensin II (Ang II) treatment.
  • In immunochemistry to label microfilament.
  • In immunofluorescence analysis to stain F-actin.

Biochem/physiol Actions

Phalloidin interacts with polymeric actin, and not oligomeric or monomeric forms. This interaction leads to highly stabilized actin filaments, which resist depolymerization and disassembly. In rats, this toxin causes death due to liver hemorrhage, and cells show abnormal actin clustering. The affinity of phalloidin to actin is not significantly altered after derivatizing fluorescently labelled phalloidin compounds. These compounds can be used to study actin structure and organization within eukaryotic cells.
Toxin that binds polymeric F actin, stabilizing it and interfering with the function of actin-rich structures.


Skull and crossbones

Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 2 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. How do I dissolve Product P5282, Phalloidin, Fluorescein Isothiocyanate Labeled?

    This product is soluble in methanol, ethanol, butanol and pyridine. It is soluble in cold water at a concentration of 5 mg/mL; it is much more soluble in hot water. See: The chemicals encyclopedia published by the Royal Society of Chemistry, 12th ed., entry# 7336 (1996). Solutions should be prepared fresh, and protected from light whenever possible.

  6. How do I prepare stock solutions of Product P5282, Phalloidin, Fluorescein Isothiocyanate Labeled?

    Stock solutions of  phalloidin conjugates have been made in methanol or DMSO at 0.1 to 5 mg/mL. Make final dilutions in aqueous physiological buffers for a staining range from 0.1 μM to 100 μM with corresponding incubation times of 15 minutes to 72 hours.

  7. What are the excitation and emission wavelengths used for fluorescent detection of Product P5282, Phalloidin, Fluorescein Isothiocyanate Labeled?

    Excitation wavelengths of 540-545 nm and emission wavelengths of 570-573 nm can be used. See: Faulstich, H., J. Muscle Res. Cell Motility, 9, 370 (1988), and Waggoner, A. et al., Methods in Cell Biology, 30, 449 (1989).

  8. How do I stain cells with Product P5282, Phalloidin, Fluorescein Isothiocyanate Labeled?

    A typical application for staining cells can be found in the product information sheet (under Documents, above).

  9. How do I store Product P5282, Phalloidin, Fluorescein Isothiocyanate Labeled?

    The product should be stored at a powder in the freezer at -20°C.

  10. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Non-muscle myosin heavy chain as a possible target for protein encoded by metastasis-related mts-1 gene.
Kriajevska MV
The Journal of Biological Chemistry, 19679-82, 269(31)-269(31) (1994)
The culture of fibroblasts from diaphragm of giant panda.
Han ZM
In Vitro Cellular & Developmental Biology. Animal, 37(10), 644-645 (2001)
Fluorescent phallotoxin, a tool for the visualization of cellular actin.
Wulf E
Proceedings of the National Academy of Sciences of the USA, 76(9), 4498-4502 (1979)
Ting Xu et al.
Journal of leukocyte biology, 84(4), 1192-1201 (2008-07-26)
Recruitment of leukocytes onto inflamed tissues is an important physiological event, in which L-selectin plays an essential role in initial leukocyte capture and at the same time, triggers cell signaling. Lck is a member of the Src family of protein
The H9C2 cell line and primary neonatal cardiomyocyte cells show similar hypertrophic responses in vitro.
Watkins SJ
In Vitro Cellular & Developmental Biology. Animal, 47(2), 125-131 (2011)

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