Anti-P13 antibodies enable researchers to detect and measure the P13 antigen in biological samples. This target is a reported synonym of the EXOSC1 gene, which encodes exosome component 1. This protein is known to function in rRNA processing, among other biological roles. The human version of P13 has a canonical amino acid length of 195 residues and a protein mass of 21.5 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. P13 is a member of the CSL4 protein family.