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EPS15 is a ubiquitously expressed protein that is involved in cell growth regulation and may be involved in the regulation of mitogenic signals and control of cell proliferation. EPS15 may be phosphorylated on tyrosine 849 following DNA damage, resulting in the internalization of EGFR. A chromosomal aberration involving EPS15 is also found in acute myelogeneous leukemias, resulting in a rogue activator protein, so EPS15 antibodies may be useful for cancer research.