Fig. 3

Plasma membranes (PM) of dissociated hippocampal neuronal somas labeled for GluR2, an AMPA type glutamate receptor of the subtype 2. Samples were identically fixed but permeabilized differently with saponin (a, b) or ethanol (c, d). Membranes were wavier and labeling density was lower in saponin-treated than in ethanol-treated samples. Scale bar = 100 nm