Ras oncogene transformation of human B lymphoblasts is associated with lymphocyte activation and with a block of differentiation .
ras oncogene transformation of human b lymphoblasts is associated with lymphocyte activation and with a block of differentiation .
B-DNA_domain_or_region I-DNA_domain_or_region O O B-cell_type I-cell_type I-cell_type O O O B-other_name I-other_name O O O O O O O