Tags: Protein.
In molecular biology CD4 (cluster of differentiation 4) is a glycoprotein found on the surface of immune cells such as T helper cells monocytes macrophages and dendritic cells. It was discovered in the late 1970s and was originally known as leu-3 and T4 (after the OKT4 monoclonal antibody that reacted with it) before being named CD4 in 1984. In humans the CD4 protein is encoded by the CD4 gene.CD4+ T helper cells are white blood cells that are an essential part of the human immune system.
