Anti-SERPINB7 antibodies are used in the immunodetection of the protein serpin family B member 7. In humans, the canonical protein has a reported length of 380 amino acid residues and a mass of 42.9 kDa. Its subcellular localization is in the cytoplasm. Alternative splicing is reported to yield 2 different isoforms for this protein. It is reported to be highly expressed in the mesangial cells. The SERPINB7 protein is a member of the Serpin protein family. Synonyms for this target antigen include PPKN, TP55, mesangium predominant gene, megsin, serine (or cysteine) proteinase inhibitor, clade B (ovalbumin), member 7, serpin peptidase inhibitor, clade B (ovalbumin), member 7, and MEGSIN.