CD112, known as poliovirus receptor related 2 protein (PRR2), Nectin-2, or Hve B, is a type I transmembrane glycoprotein, a member of the Ig gene superfamily. It is primarily found on myelomonocytic cells, megakaryocytes, dendritic cells, mast cells, CD34 positive stem cells, endothelial cells, epithelial cells, and neuronal cells. CD112 functions as a receptor for α-herpes viruses HSV-1 and pseudorabies virus (PRV). CD112 is an adhesion molecule involved in the formation of cell junction and regulation of NK- and T cell-mediated cytotoxicity through interaction with CD226 (DNAM-1) and other nectin family molecules.