tokens: However , it was not possible to ascertain whether Bcl-2 upregulation was a specific consequence of LMP1 expression or an artifact of the selection procedure whereby rare Bcl-2 + cells already present in the starting population might best be able to tolerate the potentially toxic effects of LMP1 .
folded_tokens: however , it was not possible to ascertain whether bcl-2 upregulation was a specific consequence of lmp1 expression or an artifact of the selection procedure whereby rare bcl-2 + cells already present in the starting population might best be able to tolerate the potentially toxic effects of lmp1 .
labels: O O O O O O O O O B-protein_molecule O O O O O O B-protein_molecule O O O O O O O O O O B-protein_molecule O O O O O O O O O O O O O O O O O O O B-protein_molecule O