part of host cell part host cell membrane host cell synapse host cell presynaptic membrane GO:0072556 A specialized area of membrane of the host axon terminal that faces the plasma membrane of the host neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many host synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane. other organism presynaptic membrane jl other organism pre-synaptic membrane cellular_component host cell pre-synaptic membrane 2009-12-08T02:11:18Z GO:0044231