In contrast , TGF-beta had only minimal effects on two other B cell membrane proteins , HLA-DR and CD20 .
in contrast , tgf-beta had only minimal effects on two other b cell membrane proteins , hla-dr and cd20 .
O O O B-protein_molecule O O O O O O O B-cell_type I-cell_type O O O B-protein_molecule O B-protein_molecule O