The SKII.4 monoclonal antibody specifically binds to the Poliovirus Receptor (PVR) which is also known as CD155, or Nectin-like protein 5 (NECL5). PVR is a ~70 kDa nectin-like type I transmembrane glycoprotein that belongs to the PVR-related (PRR) family within the Ig superfamily. In addition to two cell surface PVR isoforms (alpha and delta), two secreted PVR isoforms (beta and gamma) have been reported that share the same three Ig domains but differ in their C-termini. PVR is expressed on monocytes, macrophages, endothelial cells, epithelia cells, CD34+ thymocytes, and neurons. In addition to serving as a receptor for poliovirus and cytomegalovirus, PVR functions as an adhesion molecule involved in cell-cell and cell-matrix adhesion through interaction with CD96 (TACTILE), Nectin 1-3 (CD111, CD112, CD113), CD226, and vitronectin. PVR promotes natural killer (NK) cell adhesion to and lysis of target cells.
The antibody was conjugated to BD Horizon BUV615 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome with an Ex Max near 350 nm and an Em Max near 615 nm. BD Horizon Brilliant BUV615 can be excited by the ultraviolet laser (355 nm) and detected with a 610/20 filter and a 595 nm LP. Due to the excitation of the acceptor dye by the blue/yellow-green laser line, there may be significant spillover into channels detecting PE-CF594 like emissions (eg, 610/20-nm filter).