Immunofluorescence staining of PM PIPs and EEN1 in mouse hippocampal neurons
Mouse hippocampal neurons were transfected with pAOV-CaMKIIα-mCherry-2A-3Flag on DIV5 to express mCherry as volume marker (Note: the CaMKIIα promoter drives gene expression specifically in excitatory neurons but not inhibitory neurons) (Kohara et al., 2020), fixed on DIV8 and immnunostained for PM PI3P, PI4P or PI(4,5)P2. DAPI-stained cell nuclei are shown in blue.
(A–D) Shown are representative confocal microscopy images of PM PI3P (A), PM PI4P (B), PM PI(4,5)P2 (C), and costaining of PM PI(4,5)P2 and PM EEN1 (D). Lower panels are magnifications of boxed regions in the top panels. Scale bars: 5 μm.