The V46-1954 monoclonal antibody specifically recognizes mouse CD304, also known as neuropilin 1 (Nrp1). It does not cross-react with neuropilin 2 (Nrp2). CD304 is a type-1 transmembrane protein that plays important roles in neuronal development, angiogenesis, and immunosuppression. Through interactions with plexins and VEGF receptors on neurons and endothelial cells, it is a co-receptor for the class III semaphorin subfamily and vascular endothelial growth factor (VEGF), respectively. The ability of the S1 protein of SARS-CoV-2 virus to bind to Nrp1, a potential mechanism for cellular infection, is being investigated. In the immune system, CD304 is expressed on natural (thymus-derived) Treg cells and may be responsible for the unsuccessful immune regulation of tumor growth.
The antibody was conjugated to BD Horizon BV480 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 436-nm and Em Max at 478-nm, BD Horizon BV480 can be excited by the violet laser and detected in the BD Horizon BV510 (525/40-nm) filter set. BV480 has less spillover into the BV605 detector and, in general, is brighter than BV510.