Anti-Arrestin 2 antibodies enable researchers to detect and measure the Arrestin 2 antigen in biological samples. This target is a reported synonym of the ARRB1 gene, which encodes arrestin beta 1. This protein is known to function in the regulation of the ERK1 and ERK2 signaling cascade and protein phosphorylation, among other biological roles. The human version of Arrestin 2 has a canonical amino acid length of 418 residues and a protein mass of 47.1 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane, nucleus, cytoplasmic vesicles, and cytoplasm of cells and widely expressed in many tissue types. Arrestin 2 is a member of the Arrestin protein family.