Transcriptional regulator ERG is a nuclear protein that binds purine-rich sequences of DNA. Transcriptional regulator ERG is required for platelet adhesion to the subendothelium and regulates hematopoiesis. It has a DNA binding domain and a PNT (pointed) domain. ERG is expressed at higher levels in early myelocytes than in mature lymphocytes (types of white blood cells). Therefore ERG may act as a regulator of differentiation of early hematopoietic cells. This gene can be classified as a proto-oncogene, which participates in chromosomal translocations (a popular example of this phenomenon is the Philadelphia chromosome). Essentially during cell division ERG can accidentally get stuck onto a different chromosome than where it belongs.