Anti-Pet1 antibodies enable researchers to detect and measure the Pet1 antigen in biological samples. This target is a reported synonym of the FEV gene, which encodes FEV transcription factor, ETS family member. This protein is known to function in the regulation of gene expression and the regulation of transcription, among other biological roles. The human version of Pet1 has a canonical amino acid length of 238 residues and a protein mass of 25 kilodaltons. It is reported to be localized in the nucleus of cells. Pet1 is a member of the ETS protein family.