“…However, the patterns of more or less lysis by LAK or NK cells from the different donor strains was not explainable by a stronger or weaker engagement of inhibitory NK receptors by self-MHC molecules on PSCs. This result is in agreement with our finding that the PSC lines, similarly to murine ESCs, maGSCs, and iPSCs ( 32 , 36 , 38 , 39 ), largely lack MHC class I molecules at the plasma membrane as determined by flow cytometry. Instead, the PSC lines expressed ligands of activating NK receptors also similarly as the other pluripotent stem cell types ( 32 , 36 , 38 ).…”