24123
Several CAMs have been identified at the neuromuscular junction and at central synapses , where they regulate synaptic strength , by recruiting scaffolding proteins , neurotransmitter receptors and synaptic vesicles in response to the binding of counter - receptors across the synaptic cleft .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None