Anti-ACTA antibodies are protein reagents that detect specific antigens. The ACTA antigen is another term for the human protein actin alpha 1, skeletal muscle, encoded by the ACTA1 gene. The protein is known to function in the regulation of gene expression, among other biological roles. Canonically, it has an amino acid length of 377 residues and a mass of 42.1 kilodaltons. Its subcellular localization is in the cytoplasm and it is expressed in many tissues, such as the appendix and colon. The ACTA protein is a member of the Actin protein family. Other alias names for ACTA include ASMA.