988
The mGlu receptors are delineated into three distinct groups based on their G - protein coupling and agonist affinity and also exercise distinct roles in the way they regulate both long - term plasticity and long - term hippocampus - dependent memory .
 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