378
Moreover , cell - specific knock out of DARPP - 32 in striatopallidal , but not in striatonigral , MSNs prevents the increase in Ser845 phosphorylation induced by DHPG .
 Chemical: Ser845; Chemical: DHPG
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: Ser845, DHPG 
Answer:
 Chemical: Ser845; Chemical: DHPG