The v-myb oncogene , carried by avian defective retroviruses , causes leukaemias in the chicken and transforms haematopoietic cells in vitro .
the v-myb oncogene , carried by avian defective retroviruses , causes leukaemias in the chicken and transforms haematopoietic cells in vitro .
O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-virus I-virus I-virus O O B-other_name O O B-multi_cell O O B-cell_type I-cell_type O O O