Anti-POM121 transmembrane nucleoporin C antibodies are used for the immunodetection of the protein encoded by the POM121C gene. In humans, the canonical protein has a reported length of 1229 amino acid residues and a mass of 125.1 kDa. Its subcellular localization is in the nucleus and ER. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of the POM121 protein family, it is an important component of the nuclear pore complex (NPC). Other names for this target antigen include POM121 membrane glycoprotein C, nuclear pore membrane protein 121-2, pore membrane protein of 121 kDa C, and nuclear envelope pore membrane protein POM 121C. Gene orthologs have been identified in the mouse, rat and chimpanzee species.