Anti-RhoA: mouse Mab

Anti-RhoA: mouse Mab


ARH04 has been discontinued, and has been replaced by ARH05 (link)


RhoA is one of most extensively studied member of Rho GTPase family. This family is involved in a wide range of cellular responses, including cytoskeletal reorganization, regulation of transcription, cell migration, cellular transformation and metastasis. RhoA is the predominant Rho isoform that is expressed in a large number of different cell types.


Product Uses Include

This antibody is recommended for detection of RhoA in human, mouse, rat or other extracts. The following protocols have been tested with this anti body: 

  • Western blot analysis:  recommended 
  • Immunocytochemistry:  recommended




The anti-RhoA antibody (Cat. # ARH04) is a mouse monoclonal antibody that only recognizes RhoA, not , RhoB, RhoC, Rac1, Rac2, Rac3, Cdc42 or H-Ras. Other commercially available RhoA antibodies recognize one or more of these close isoforms  Platelet extract (Cat. # EXT01) is included as a positive control. ARH04 is supplied as a lyophilized white powder. 

Figure 1 - Western analysis of small G-protein sub-families.


Figure 1: Western blot analysis of purified small G-proteins using ARH03 as the primary antibody.. Recombinant small G-proteins and platelet extract were separated by SDS-PAGE and transferred to PVDF membrane.  Anti-RhoA antibody was diluted to 500 ng/ml (1:500) in PBST and the signal developed with a sensitive chemiluminescence reagent. Lane 1; 25 ng RhoA-6xHIS, Lane 2; 250 ng RhoB-6xHIS, Lane 3; 250 ng RhoC-6xHIS, Lane 4; 250 ng Rac1-6xHIS, Lane 5; 250 ng Cdc42-6xHIS, Lane 6; 40 µg human platelet extract. Note: RhoA-6xHIS runs at 28kDal whereas the native RhoA in platelet extract runs at 23kDal.

Figure 2 - Western analysis of cell extracts from different species


Figure 2: Western blot analysis of cell extracts using ARH04 as the primary antibody.  Chemiluminescence detection of  RhoA in cell extracts (50 µg each) of rat NRK cells (lane 1), human HeLa cells (lane 2), bovine brain extract (lane 3), and human platelet cell extract (lane 4). The RhoA band is located at approx. 22kDal.  The blot was probed with a 500 ng/ml (1:500) dilution of anti-RhoA antibody.  Molecular weight markers are from Invitrogen.

Table 1 - Reactivity of other commercially available RhoA antibodies



RhoB and RhoC

Rac sub-family

Ras sub-family


Cytoskeleton, Inc.

(Cat. # ARH04)







(Cat. # ab54835)


Santa Cruz

(Cat. #SC-418)







(Cat. # 05-778)







NT = Not tested

Other associated products:

Rho Inhibitor, cell permeable (Cat.# CT04)

Anti-Cdc42 monoclonal antibody (Cat.# ACD03)

Anti-Rac1 monoclonal antibody (Cat.# ARC03)

Cdc42 G-LISA Activation Assay (Cat.# BK127)

RhoA G-LISA Activation Assay (Cat.# BK124)

Rac1 G-LISA Activation Assay (Cat.# BK126)

Rac1,2,3 G-LISA Activation Assay (Cat.# BK125)

For product Datasheets and MSDSs please click on the PDF links below.   For additional information, click on the FAQs tab above or contact our Technical Support department at

Lee, J., Choi, J.A., Ju, Hh. et al. Role of MCP-1 and IL-8 in viral anterior uveitis, and contractility and fibrogenic activity of trabecular meshwork cells. Sci Rep 11, 14950 (2021).
Vestre, Katharina et al. “Rab6 regulates cell migration and invasion by recruiting Cdc42 and modulating its activity.” Cellular and molecular life sciences : CMLS vol. 76,13 (2019): 2593-2614. doi:10.1007/s00018-019-03057-w
Huang, Yuxing et al. “Arp2/3-Branched Actin Maintains an Active Pool of GTP-RhoA and Controls RhoA Abundance.” Cells vol. 8,10 1264. 16 Oct. 2019, doi:10.3390/cells8101264

Am. J. Physiol. Gastrointest. Liver Physiol. 2015; 308, G92-G99.
"Cellular inhibitor of apoptosis protein 2 controls human colonic epithelial restitution, migration, and Rac1 activation"
Author(s): Seidelin J.B. et al.
(See PubMed article)

Oncol Rep. 2015; 33, 1411-1417.
"Inhibition of microtubule-associated protein 1 light chain 3B via small-interfering RNA or 3-methyladenine impairs hypoxia-induced HO8910PM and HO8910 epithelial ovarian cancer cell migration and invasion and is associated with RhoA and alterations of the actin cytoskeleton"
Author(s): Tang Z. et al.
(See PubMed article)

Neurotoxicology. 2014; doi: 10.1016/j.neuro.2014.09.005.
"Amelioration of cisplatin-induced experimental peripheral neuropathy by a small molecule targeting p75NTR. "
Author(s): Friesland A. et al.
(See PubMed article)

 J. Pharm. Pharmacol. 2014; 66, 418-427.
"Differential impact of the Bisphosphonate Alendronate on undifferentiated and terminally differentiated human myogenic cells."
Author(s): K. Shiomi et al.
(See PubMed article)

Mol. Cell Biol. 2013; 33, 2773-2786.
"Regulation of focal adhesion kinase activation, breast cancer cell motility, and amoeboid invasion by the RhoA guanine nucleotide exchange factor Net1. "
Author(s): Carr H.S., et al.,
(See PubMed article)

Int. J. Cancer. 2012; 130, 1273–1283.
"Human melanoma cells express FGFR/Src/Rho signaling that entails an adhesion-independent caveolin-1 membrane association. "
Author(s): Fecchi K., et al.
(See PubMed article)

PLoS ONE. 2012; 7: e38770.
"EGFR inhibition in glioma cells modulates Rho signaling to inhibit cell motility and invasion and cooperates with temozolomide to reduce cell growth. "
Author(s): Ramis G., et al.
(See PubMed article)

BMC Cancer. 2012; 12, 469.
"Vincristine enhances amoeboid-like motility via GEF-H1/RhoA/ROCK/Myosin light chain signaling in MKN45 cells. "
Author(s): Eitaki M., et al.
(See PubMed article)

Biomaterials. 2012; 33, 2902-2915.  
"The RhoA-ROCK-PTEN pathway as a molecular switch for anchorage dependent cell behavior. "
Author(s): Yang S. and Kim H.-M.
(See PubMed article)

Question 1:  What is the antigen that this antibody was raised against?

Answer 1:  The RhoA specific antibody (Cat. # ARH04) is a mouse monoclonal antibody and it was raised against amino acids 120-150 of the human RhoA protein.


Question 2:  What species has this antibody been tested against?

Answer 2:  The RhoA specific antibody has been used to label RhoA proteins in human, canine, bovine, rat and mouse extracts.


 If you have any questions concerning this product, please contact our Technical Service department at