human thymocytes were fractionated to a low or high specific gravity fraction ( lf or hf ) by the bsa incontinuous density gradient method , and stimulated by lectin , lymphokine and mixed lymphocyte culture ( mlc ) in order to induce natural killer ( nk ) -like nonspecific killer ( activated lymphocyte killer , alk ) cell activity .
C0086418
human
C1416933
lf