tokens: Various modes of basic helix-loop-helix protein -mediated regulation of murine leukemia virus transcription in lymphoid cell lines .
folded_tokens: various modes of basic helix-loop-helix protein -mediated regulation of murine leukemia virus transcription in lymphoid cell lines .
labels: O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O B-virus I-virus I-virus O O B-cell_line I-cell_line I-cell_line O