K562 cells (DSMZ ACC10) were transfected with the Cell Line Nucleofector® Kit V, Program T-003 and a plasmid encoding
the mouse MHC class I heavy chain molecule H-2Kk. Cells were stained 5 hours post Nucleofection® with a PE-coupled antibody
directed against H-2Kk and analyzed by flow cytometry. K562 cells were gated according to forward/side scatter (A). Dead cells
were excluded by staining with propidium iodide and gating (B). H-2Kk expression is shown after Nucleofection® without (C) and
with plasmid DNA (D).