The G9P3 monoclonal antibody specifically recognizes mouse EVA1, which is encoded by the Mpzl2 gene. EVA1 is a member of the immunoglobulin-like cell-adhesion molecule (Ig-CAM or IgSF CAM) family, members of which are anchored to the surface of epithelial and endothelial cells via a GPI domain. This class of adhesion molecules interacts intracellularly with cytoskeletal proteins and extracellularly with Ig-CAM family members, by homophilic or heterophilic binding, and with other classes of adhesion molecules such as integrins and cadherins. EVA1 is expressed on and is involved in the structural integrity of epithelia throughout the body, eg mammary glands, liver, inner ear, and the blood-brain barrier. In the thymus, EVA1 is expressed both on thymic epithelial cells (TECs) and on a subset of developing thymocytes, known as DN3. It is a low-affinity mediator of developmental signals between thymocytes and TEC that support the differentiation and survival of both developing thymocytes and the TECs. G9P3 mAb was produced in EVA1 knockout mice immunized with recombinant mouse EVA1 extracellular region, and it recognizes mouse and human EVA1 expressed on transfected cells.
The antibody was conjugated to BD Horizon BV421 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max near 407 nm and Em Max near 421 nm, BD Horizon BV421 can be excited by the violet laser (405 nm) and detected with a 450/50 nm filter. BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue™ conjugates. Due to nearly identical excitation and emission properties but different spillover characteristics, BD Horizon BV421, Pacific Blue™, and BD Horizon V450 cannot be used simultaneously.