Human NK cell lines, NK-92 (ATCC #CRL-2407) and PTA-6967 (ATCC #PTA-6967) were maintained in NK cell media as described previously (12 (link)). NK cell media [Alpha Minimum Essential medium without ribonucleosides and deoxyribonucleosides but with 2 mM L-glutamine and 1.5 g/L sodium bicarbonate (Gibco #12561-056) was supplemented with 0.2 mM inositol, 0.1 mM 2-mercaptoethanol, 0.02 mM folic acid, 12.5% horse serum (Gibco #16050-122), 12.5% fetal calf serum (Gibco #10438-034), and 100 U/mL recombinant IL-2 (R&D Systems #202-IL)].
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