NK response post CBT. Recovering NK cells from CB units with a combined HLA-C1-KIR2DL2/L3/2DS2 genotype express more CD107a (A) and interferon-γ (B) in response to stimulation with K562 targets than those from CB units that were either predicted to be unlicensed (HLA-C1-negative) or were KIR2DS2-negative. Boxes represent first and third quartiles; lines inside boxes represent median values, with whiskers extending to 1.5 times the interquartile range.