• USA Home
  • MABT1333 - Anti-pan-Actin Antibody, clone 2A3

MABT1333 Sigma-Aldrich

Anti-pan-Actin Antibody, clone 2A3

clone 2A3, from mouse

Synonym: Skeletal muscle alpha-actin, Smooth muscle alpha-actin, Cytoplasmic beta-actin, Cardiac muscle alpha-actin, Cytoplasmic gamma-actin, Smooth muscle gamma-actin

  •  eCl@ss 32160702

  •  NACRES NA.41



Related Categories Alphabetical Index, Antibodies, P-PA, Primary Antibodies
clone   2A3, monoclonal
biological source   mouse
application(s)   western blot: suitable
species reactivity   yeast, mouse, hamster, Drosophila, hamster, rat, human, human, rat, yeast, mouse, monkey, Drosophila, monkey
packaging   antibody small pack of 25 μL
isotype   IgG1κ
antibody product type   primary antibodies
NCBI accession no.   NP_001092
UniProt accession no.   P60709
Gene Information   human ... ACTA1(58), ACTC1(70), ACTG1(71)


General description

Actin is a multi-functional cytoskeletal protein that serves as the basic building block of cytoskeletal microfilaments. Six different actin types have been reported. Skeletal muscle alpha-actin (UniProt: P68133) is encoded by the ACTA1 gene, smooth muscle alpha-actin (UniProt: P62736) by the ACTA2 gene, cytoplasmic beta-actin (UniProt: P60709) by the ACTB gene, cardiac muscle alpha-actin (UniProt: P68032) by the ACTC1 gene, cytoplasmic gamma-actin (UniProt: P63261) by the ACTG1 gene, and smooth muscle gamma-actin (UniProt: P63267) by the ACTG2 (also known as ACTA3) gene. Although actins show about 90% overall sequence homology, isoforms do show spatial, temporal, and tissue-specific expression patterns and only 50-60% homology is found in their 18 N-terminal residues. Cytoplasmic beta and gamma actins are thought to be present in all cells, while the other four actin isoforms are typically found in specific adult muscle tissue types. Actins exist in a variety of structural states, depending on the specific ionic conditions or the interaction with ligand proteins. The oligomeric and polymeric forms that actin molecules assume are dependent on the distinct conformations they adopt. This pan-actin antibody detects all isoforms actin.


Clone 2A3 detects all forms of actin in multiple species. It targets an epitope with in the C-terminal region.


KLH-conjugated linear peptide corresponding to a fragment from the C-terminal region of human Actin.


Anti-pan-Actin, clone 2A3, Cat. No. MABT1333, is a mouse monoclonal antibody that detects all forms of actin and has been tested for use in Western Blotting.

Research Category
Cell Structure

Western Blotting Analysis: A 1:50 dilution from a representative lot detected Actins in various species samples (e.g. Human, rat, mouse, monkey, Hamster, Drosophila, Yeast) (Courtesy of Martina Mitterhuber, M.sc and Egon Ogris, M.D., Medical University of Vienna, Austria).

Target description

~42 kDa observed; 41.74 kDa calculated. Uncharacterized bands may be observed in some lysate(s).

Physical form

Format: Purified

Protein G purified

Purified mouse monoclonal antibody IgG1 in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.


Evaluated by Western Blotting in HeLa cell lysate.

Western Blotting Analysis: A 1:500 dilution of this antibody detected Actins in HeLa cell lysate.

Other Notes

Concentration: Please refer to lot specific datasheet.

Safety & Documentation

Safety Information

Safety Information for this product is unavailable at this time.
Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy

Small Pack Size Primary Antibodies

Economical means affordable options when exploring new antibodies. To provide you with convenient and economical access to our highly characterized antibodies, we now offer small pack size antibodies...
Keywords: Apoptosis, Cancer, Enzyme-linked immunosorbent assay, Epigenetics, Flow cytometry, Growth factors, Immunocytochemistry, Immunohistochemistry, Immunology, Individual protein Immunoprecipitation, Inflammation, Neuroscience, Research areas, Western blot

Related Content

Antibody Explorer | Buy Primary Antibodies & Secondary Antibodies

Primary, Secondary and Recombinant Monoclonal Antibodies Providing highly cited primary and secondary antibodies, we have you covered for your ELISA, western blot, immunohistochemistry or other assay...
Keywords: Alzheimer Disease, Cancer, Chromatin immunoprecipitation, Diagnostic, Enzyme-linked immunosorbent assay, Flow cytometry, Immunocytochemistry, Immunofluorescence, Immunohistochemistry, Neuroscience, Western blot

Related Products

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?