tokens: In addition , the level of jun protein was elevated by 2 to 5-fold within 4 h in HU treated cells .
folded_tokens: in addition , the level of jun protein was elevated by 2 to 5-fold within 4 h in hu treated cells .
labels: O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O O B-other_organic_compound O O O