tokens: Chloramphenicol acetyltransferase expression constructs containing regions of the human collagenase-1 promoter were stably or transiently transfected into U937 cells , and reporter activity was assessed at various times after the onset of phorbol 12-myristate 13-acetate ( PMA ) -mediated differentiation .
folded_tokens: chloramphenicol acetyltransferase expression constructs containing regions of the human collagenase-1 promoter were stably or transiently transfected into u937 cells , and reporter activity was assessed at various times after the onset of phorbol 12-myristate 13-acetate ( pma ) -mediated differentiation .
labels: B-protein_molecule I-protein_molecule O O O O O O B-DNA_domain_or_region B-protein_molecule O O O O O O O B-cell_line I-cell_line O O B-other_name I-other_name O O O O O O O O O B-other_organic_compound I-other_organic_compound I-other_organic_compound O O O O O O