Reconstitution of a cell-free system and identification of the ubiquitin-carrier protein , E2 , and a novel ubiquitin-protein ligase , E3 , involved in conjugation .
reconstitution of a cell-free system and identification of the ubiquitin-carrier protein , e2 , and a novel ubiquitin-protein ligase , e3 , involved in conjugation .
O O O B-other_name I-other_name O O O O B-protein_family_or_group I-protein_family_or_group O B-protein_molecule O O O O B-protein_family_or_group I-protein_family_or_group O B-protein_molecule O O O O O