We cultured M-TAT cells long term ( > 1 year ) in the continuous presence of erythropoietin ( EPO ) , granulocyte-macrophage colony-stimulating factor ( GM-CSF ) , or stem cell factor ( SCF ) .
we cultured m-tat cells long term ( > 1 year ) in the continuous presence of erythropoietin ( epo ) , granulocyte-macrophage colony-stimulating factor ( gm-csf ) , or stem cell factor ( scf ) .
O O B-cell_line I-cell_line O O O O O O O O O O O O B-protein_molecule O B-protein_molecule O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O