Anti-Act antibodies enable researchers to detect and measure the Act antigen in biological samples. This target is a reported synonym of the ACTG1 gene, which encodes actin gamma 1. This protein is known to function in angiogenesis and the regulation of cell migration, among other biological roles. The human version of Act has a canonical amino acid length of 375 residues and a protein mass of 41.8 kilodaltons. It is reported to be localized in the cytoplasm of cells and notably expressed in many tissues, such as the appendix and breast. Act is a member of the Actin protein family.