HTLV-I -infected peripheral blood T cells exhibit an initial phase of interleukin-2 ( IL-2 ) -dependent growth ; over time , by an unknown mechanism , the cells become IL-2 -independent .
htlv-i -infected peripheral blood t cells exhibit an initial phase of interleukin-2 ( il-2 ) -dependent growth ; over time , by an unknown mechanism , the cells become il-2 -independent .
B-virus O O O B-cell_type I-cell_type O O O O O B-protein_molecule O B-protein_molecule O O O O O O O O O O O O O O O B-protein_molecule O O