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Santa Cruz discontinued a large number of its polyclonal products as a result of the USDA settlement that was made public May 19th 2016

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We recommend the following alternatives

W   IHC IF     H M R Mk
REACTIVITY SENSITIVITY MW (kDa) Isotype
75 Moesin. 80 Ezrin, Radixin. Rabbit 

Product Usage Information

Storage: Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Specificity / Sensitivity

Phospho-Ezrin (Thr567)/Radixin (Thr564)/Moesin (Thr558) (41A3) Rabbit mAb detects endogenous levels of ezrin, radixin and moesin only when phosphorylated at Thr567, 564 or 558, respectively. This antibody does not cross-react with related phospho-proteins such as merlin or band 4.1.


Species predicted to react based on 100% sequence homology: Xenopus, Dog, C. elegans

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr567 of human ezrin.

The ezrin, radixin, and moesin (ERM) proteins function as linkers between the plasma membrane and the actin cytoskeleton and are involved in cell adhesion, membrane ruffling, and microvilli formation (1). ERM proteins undergo intra or intermolecular interaction between their amino- and carboxy-terminal domains, existing as inactive cytosolic monomers or dimers (2). Phosphorylation at a carboxy-terminal threonine residue (Thr567 of ezrin, Thr564 of radixin, Thr558 of moesin) disrupts the amino- and carboxy-terminal association and may play a key role in regulating ERM protein conformation and function (3,4). Phosphorylation at Thr567 of ezrin is required for cytoskeletal rearrangements and oncogene-induced transformation (5). Ezrin is also phosphorylated at tyrosine residues upon growth factor stimulation. Phosphorylation of Tyr353 of ezrin transmits a survival signal during epithelial differentiation (6).


1.  Tsukita, S. and Yonemura, S. (1999) J Biol Chem 274, 34507-10.

2.  Mangeat, P. et al. (1999) Trends Cell Biol 9, 187-92.

3.  Matsui, T. et al. (1998) J Cell Biol 140, 647-57.

4.  Gautreau, A. et al. (2000) J Cell Biol 150, 193-203.

5.  Tran Quang, C. et al. (2000) EMBO J 19, 4565-76.

6.  Gautreau, A. et al. (1999) Proc Natl Acad Sci U S A 96, 7300-5.


Entrez-Gene Id 7430 , 4478 , 5962
Swiss-Prot Acc. P15311 , P26038 , P35241


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
DRAQ5 is a registered trademark of Biostatus Limited.
U.S. Patent No. 5,675,063.

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Phospho-Ezrin (Thr567)/Radixin (Thr564)/Moesin (Thr558) (41A3) Rabbit mAb