Cellular localization of NKp44L in tumor cells. Immunofluorescence microscopy was performed on acetone-fixed HeLa cells stained with anti-MLL5 Ab (αMLL5), anti-NKp44L mAb (αNKp44L), or NKp44-Ig fusion protein. (A) Cytoplasmic and nuclear staining. (B) Intracellular colocalization of NKp44L and NKp44-Ig. (C-D) Intracellular colocalization of calnexin (α−calnexin) either with NKp44L (C) or NKp44-Ig fusion protein (D).