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Differences in the total and phosphorylated level of ERK in NK cells harvested from healthy donors and cancer patients. NK cells were isolated from the peripheral blood samples by negative selection using Dynabeads. The total and phosphorylated levels of ERK were determined as described in M&M. (A) Data of MFI of total levels of ERK are shown as the mean ± SEM. (B) Data of MFI of phosphorylated levels of ERK are shown as the mean ± SEM. (** p < 0.01).
