tokens: The active enzyme was expressed in Escherichia coli and in insect cells as a non-fusion protein .
folded_tokens: the active enzyme was expressed in escherichia coli and in insect cells as a non-fusion protein .
labels: O O O O O O B-mono_cell I-mono_cell O O B-cell_type I-cell_type O O B-protein_family_or_group I-protein_family_or_group O