Anti-phosphorylated CTD interacting factor 1 antibodies are used for the immunodetection of the protein encoded by the PCIF1 gene. In humans, the canonical protein has a reported length of 704 amino acid residues and a mass of 80.7 kDa. Its subcellular localization is in the nucleus. It is ubiquitously expressed across many tissue types. It is a member of the CAPAM protein family. Other names for this target antigen include PDX-1 C terminus-interacting factor 1, PDX1 C-terminal inhibiting factor 1, cap-specific adenosine methyltransferase, and mRNA (2'-O-methyladenosine-N(6)-)-methyltransferase. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.