We found by protein-affinity chromatography that Rb in nuclear extracts or produced by in vitro translation directly bound to IE2 .
we found by protein-affinity chromatography that rb in nuclear extracts or produced by in vitro translation directly bound to ie2 .
O O O B-other_name I-other_name O B-protein_molecule O B-cell_component I-cell_component O O O O O O O O O B-protein_molecule O