Thus , the block in MHC class II inducibility in RB -defective cells is not due to a block in CIITA inducibility .
thus , the block in mhc class ii inducibility in rb -defective cells is not due to a block in ciita inducibility .
O O O O O B-other_name B-other_name I-other_name I-other_name O B-protein_molecule O O O O O O O O O B-DNA_domain_or_region O O