Neuroligin-1 is found on the postsynaptic side of excitatory synapses 5, and neurexins may be primarily localized to the presynaptic membrane, although definitive evidence is lacking. Serafini and ...

Using eMAP researchers labeled protein components on both the presynaptic side (bassoon) and post-synaptic side (PSD-95) of an excitatory synapse in a mouse. Disclaimer: AAAS and EurekAlert!