ClusterofDifferentiation47,orCD47,playsanessentialroleincellgrowth,death,migration,andadhesion.CD47bindingtoSIRP-αmediatesphagocytosisbysendinga“donoteatme”signaltophagocytes.CD47proteinsareoftenoverexpressedbytumorcellsasameansforthemtoescapephagocytosis.Asaresult,canceroustumorcellshavetheABIlitytoproliferateandevadetheimmunesystem.