PSDs in cultured hippocampal neurons labeled for GKAP and Shank.

<p>Label for GKAP (A) is closely associated with the dense material at the core of the PSD complex (arrows), while label for Shank (B) is located in a wider area of the PSD complex (arrows) and many of the labels are distal to the dense material lining the postsynaptic membrane. Scale bar = 0.1 μm.