Description: This R3-5G4 monoclonal antibody recognizes human Runx3, a 44 kDa transcription factor that belongs to the Runt domain-containing family. Runx3 is expressed in hematopoietic cells such as T cells, B cells, and myeloid cells. This transcription factor is also expressed in non-hematopoietic tissues, including the epidermis, bone, and dorsal root ganglia. Runx3 has been established to play a critical role in thymocyte development. More specifically, Runx3 promotes CD8 + T cell development by silencing Cd4 expression. Finally, studies have demonstrated the tumor suppressive activity of in a variety of cancers (e.g., gastric and breast cancers).