Differentiation assays using water soluble phorbol esters reveal that differentiation becomes irreversible soon after AP-1 appears .
differentiation assays using water soluble phorbol esters reveal that differentiation becomes irreversible soon after ap-1 appears .
B-other_name I-other_name O B-other_organic_compound I-other_organic_compound I-other_organic_compound I-other_organic_compound O O O O O O O B-protein_molecule O O