Figure 3.

(A) Percentage of CD56⁺ natural killer (NK) cells expressing perforin and granzyme B cultured with OP9 and M2-10B4 feeder cells at days 28, 35, and 42 of the differentiation protocol. (B) Mean fluorescence intensity of perforin and granzyme B of CD56⁺ NK cells generated in the presence of OP9 and M2-10B4 feeder cells at days 28, 35, and 42 of differentiation. p-Value: *p < 0.05, **p < 0.005, and ***p < 0.001. The absence of any asterisk indication means there are no significant differences.