In contrast , levels of the transcriptional factor AP-1 , which is not known to be important in B cell Ig production , were reduced by TGF-beta .
in contrast , levels of the transcriptional factor ap-1 , which is not known to be important in b cell ig production , were reduced by tgf-beta .
O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O O O B-cell_type I-cell_type B-protein_family_or_group O O O O O B-protein_molecule O