Cytotoxic activity ofNK cells was measured by using a 51Crrelease microassay (33). Myelogenic leukemic cell line K562 was the target cell for the cytotoxicity assay.
Cytotoxic activity ofNK cells was measured by using a 51Crreleasemicroassay (33). Myelogenic leukemic cell line K562was the target cell for the cytotoxicity assay.