A Western blot analysis was used to investigate HER-2/neu expression , whereas a chromium-release assay using the K562 cell line as target was used to measure natural killer ( NK ) cell activity .
a western blot analysis was used to investigate her-2/neu expression , whereas a chromium-release assay using the k562 cell line as target was used to measure natural killer ( nk ) cell activity .
O B-other_name I-other_name I-other_name O O O O B-protein_molecule O O O O B-other_name I-other_name O O B-cell_line I-cell_line I-cell_line O O O O O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O