PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2046667-2 1991 K562 cells normally synthesize fetal hemoglobin (gamma-globin), but treatment with tumor-promoting phorbol esters (phorbol myristate acetate and tetradecanoyl phorbol acetate) results in the loss of the erythroid phenotype of the cells and causes a shift toward a megakaryocytic phenotype. Phorbol Esters 99-113 hemoglobin subunit gamma 1 Homo sapiens 49-61