We previously reported the purification of human PTF , a complex of four subunits , and the molecular cloning and characterization of PTF gamma and delta subunits .
we previously reported the purification of human ptf , a complex of four subunits , and the molecular cloning and characterization of ptf gamma and delta subunits .
O O O O B-other_name O B-protein_complex I-protein_complex O O O O B-protein_subunit I-protein_subunit O O O B-other_name I-other_name O O O O O O O O O