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Anti-alpha-Actin Antibody, Cardiac Muscle Antibody, clone 22D3

clone 22D3, from mouse

Actin, alpha cardiac muscle 1, Alpha-cardiac actin

Quality Level

biological source


antibody form

purified immunoglobulin

antibody product type

primary antibodies


22D3, monoclonal

species reactivity

goat, rat, rabbit, human

species reactivity (predicted by homology)

porcine (based on 100% sequence homology), mouse (based on 100% sequence homology)


flow cytometry: suitable
immunocytochemistry: suitable
immunofluorescence: suitable
western blot: suitable



NCBI accession no.

UniProt accession no.

shipped in


Gene Information

human ... ACTC1(70)

General description

Actin, alpha cardiac muscle 1 (UniProt P68032; also known as Alpha-cardiac actin) is encoded by the ACTC1 (also known as ACTC, ASD5, CMD1R, CMH11, LVNC4) gene (Gene ID 70) in human. 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 is encoded by the ACTA1 gene, smooth muscle alpha-actin by the ACTA2 gene, cytoplasmic beta-actin by the ACTB gene, cardiac muscle alpha-actin by the ACTC1 gene, cytoplasmic gamma-actin by the ACTG1 gene, and smooth muscle gamma-actin by the ACTG2 (a.k.a. ACTA3) gene. Although actins show >90% overall sequence homology, isoforms 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.


Clone 22D3 specifically detected alpha-cardiac actin in rat myocardium homogenates with no cross-reactivity toward - or -smooth muscle actin in rat aorta and chicken gizzard homogenates, cytoplasmic - or -actin in human platelet lysate, nor -skeletal actin in rat skeletal muscle homogenate (Driesen, R.B., et al. (2009). J. Cell. Mol. Med. 13(5):896-908).


KLH-conjugated linear peptide corresponding to human mature alpha-cardiac actin N-terminal end sequence with an acetylated N-terminus.


Research Category
Cell Structure
Immunocytochemistry Analysis: A representative lot immunostained 4% paraformaldehyde-fixed, 0.05% NP-40-permeabilzed rectangular rabbit cardiomyocytes by indirect immuoflourescence (Driesen, R.B., et al. (2009). J. Cell. Mol. Med. 13(5):896-908).

Immunofluorescence Analysis: A representative lot immunostained cardiomyocytes in human left ventricular endocardial biopsies, rabbit left ventricular myocardium, as well as in goat atrial myocardium frozen tissue sections by fluorescent immunohistochemistry (Driesen, R.B., et al. (2009). J. Cell. Mol. Med. 13(5):896-908).

Western Blotting Analysis: A representative lot specifically detected alpha-cardiac actin in rat myocardium homogenate with no cross-reactivity toward - or -smooth muscle actin in rat aorta and chicken gizzard homogenates, cytoplasmic - or -actin in human platelet lysate, nor -skeletal actin in rat skeletal muscle homogenate (Driesen, R.B., et al. (2009). J. Cell. Mol. Med. 13(5):896-908).
This mouse monoclonal Anti-alpha-Actin Antibody, Cardiac Muscle, clone 22D3, Cat. No. MABT823 is validated for use in Flow Cytometry, Immunocytochemistry, Immunofluorescence, and Western Blotting for the detection of alpha-cardiac actin.


Evaluated by Flow Cytometry in HeLa cells.

Flow Cytometry Analysis: 2 µL of this antibody detected alpha-cardiac actin in one million 4% paraformaldehyde-fixed, 0.2% Triton X-100-permeabilzed HeLa cells.

Target description

41.78/42.02 kDa (mature/pro-form) calculated.

Physical form

Protein G purified.
Format: Purified
Purified mouse 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.

Other Notes

Concentration: Please refer to lot specific datasheet.


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.

Storage Class Code

12 - Non Combustible Liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Rowan M Karvas et al.
Molecular human reproduction, 26(6), 425-440 (2020-05-03)
Human placental development during early pregnancy is poorly understood. Many conceptuses are lost at this stage. It is thought that preeclampsia, intrauterine growth restriction and other placental syndromes that manifest later in pregnancy may originate early in placentation. Thus, there
Christine Chaponnier et al.
F1000Research, 5, 416-416 (2016-06-24)
Higher vertebrates (mammals and birds) express six different highly conserved actin isoforms that can be classified in three subgroups: 1) sarcomeric actins, α-skeletal (α-SKA) and α-cardiac (α-CAA), 2) smooth muscle actins (SMAs), α-SMA and γ-SMA, and 3) cytoplasmic actins (CYAs)

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