The Zt/g4 monoclonal antibody specifically binds to RON, which is also known as CD136, Macrophage-stimulating protein receptor (MSP-Receptor, MSP-R), Macrophage stimulating 1 receptor (c-met-related tyrosine kinase) (MST1R), or Protein-tyrosine kinase 8 (PTK8). RON is a type I transmembrane glycoprotein that belongs to the receptor tyrosine kinase family. It is expressed on cells as a disulfide-linked heterodimer. RON is expressed on macrophages, keratinocytes, erythroblasts and epithelial cells from the skin, lung, kidney, liver, intestine, colon, and bone marrow. RON reportedly regulates many physiological processes including the survival, migration, differentiation, and effector functions of a variety of cell types including epithelial cells, and macrophages. RON binds Macrophage stimulating protein (MSP). Overexpression of RON may contribute to the malignant transformation of epithelial cells.
The antibody was conjugated to BD Horizon™ BV650 which is part of the BD Horizon Brilliant™ Violet family of dyes. This dye is a tandem fluorochrome of BD Horizon BV421 with an Ex Max of 405-nm and an acceptor dye with an Em Max at 650-nm. BD Horizon BV650 can be excited by the violet laser and detected in a filter used to detect APC-like dyes (eg, 660/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there will be spillover into the APC and Alexa Fluor® 700 detectors. However, the spillover can be corrected through compensation as with any other dye combination.