tokens: Additional experiments showed that levels of BCL-2 protein decreased during differentiation of myeloid leukemic cells .
folded_tokens: additional experiments showed that levels of bcl-2 protein decreased during differentiation of myeloid leukemic cells .
labels: O O O O O O B-protein_molecule I-protein_molecule O O B-other_name O B-cell_type I-cell_type I-cell_type O