This was unambiguously demonstrated by the fact that plasmacytoma x B cell hybrids carrying an AIR-1 locus derived from CIITA -expressing cells do not express CIITA -specific transcripts .
this was unambiguously demonstrated by the fact that plasmacytoma x b cell hybrids carrying an air-1 locus derived from ciita -expressing cells do not express ciita -specific transcripts .
O O O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_molecule O O O O O B-protein_molecule O O O