ABT1485 Sigma-Aldrich


clone, from rabbit, purified by affinity chromatography

Synonym: Actin, alpha skeletal muscle, Alpha-actin-1

  •  eCl@ss 32160702



Related Categories AC-AC, Alphabetical Index, Antibodies, Primary Antibodies
clone   polyclonal
biological source   rabbit
application(s)   immunocytochemistry: suitable
  immunohistochemistry: suitable (paraffin)
  western blot: suitable
species reactivity   human, mouse, mouse, human
shipped in   ambient
Quality Level   100
antibody product type   primary antibodies
purified by   affinity chromatography
NCBI accession no.   NP_001091
UniProt accession no.   P68133
Gene Information   human ... ACTA1(58)


General description

Actins are globular multi-functional proteins that serve as the basic building blocks of cytoskeletal microfilaments and are among the most conserved eukaryotic proteins. Six actin types exist, skeletal muscle alpha-actin (ACTA1), smooth muscle alpha-actin (ACTA2), cytoplasmic beta-actin (ACTB), cardiac muscle alpha-actin (ACTC1), cytoplasmic gamma-actin (ACTG1), and smooth muscle gamma-actin (ACTG2, a.k.a. ACTA3). Although actins show >90% overall sequence homology, isotypes do show spatial, temporal, and tissue-specific expresson patterns and only 50-60% homology is found in their 18 N-terminal residues. Cytoplasmic - and -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. In additon to serving as the basic building blocks of cytoskeletal microfilaments, actins are involved in multiple nuclear functions and adopt specific conformations that are important for their association with nuclear actin-binding proteins.


Broad species reactivity expected due to 100% sequence homology, including Bovine, Horse, Non-Human Primate, Porcine, Rabbit, and Rat.

This rabbit polyclonal antibody was raised against skeletal muscle alpha-actin (ACTA1) N-terminal end sequence that shares 80% sequence identity in the corresponding region with cardiac muscle alpha-actin (ACTC1), smooth muscle alpha-actin (ACTA2), and cytoplasmic gamma-actin (ACTG1). Immunogen sequence is not found in smooth muscle gamma-actin (ACTG2, a.k.a. ACTA3) and cytoplasmic beta-actin (ACTB).


Epitope: N-terminus

KLH-conjugated linear peptide corresponding to the N-terminal end sequence of mature skeletal muscle alpha-actin (ACTA1).


Immunocytochemistry Analysis: A 1:250 dilution from a representative lot detected both cytoplasmic and nuclear actin immunoreactivity in A431 and NIH/3T3 cells.

Immunohistochemistry Analysis: A 1:1,000 dilution from a representative lot detected actin in human cardiac muscle, skeletal muscle, and small intestine tissue sections.

This polyclonal antibody is also available as Alexa Fluor® 488 and Alexa Fluor 647 conjugates (Cat. No. ABT1485-AF488 and ABT1485-AF647) for flow cytometry, immunocytochemistry, immunofluorescence applications.

Research Category
Cell Structure

This rabbit polyclonal Anti-Actin Antibody, Cat. No. ABT1485 is validated for use in Immunocytochemistry, Immunohistochemistry (Paraffin), and Western Blotting for the detection of Actin.

Target description

~42.0 kDa observed. Uncharacterized bands may be observed in some lysate(s).

Physical form

Affinity purified.

Purified rabbit polyclonal antibody 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.

Legal Information

ALEXA FLUOR is a registered trademark of Life Technologies


Evaluated by Western Blotting in human skeletal muscle tissue lysate.

Western Blotting Analysis: A 1:5,000 dilution of this antibody detected actin in 10 µg of human skeletal muscle tissue 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


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