5851
Further , 5 - HT1A autoreceptor desensitization was evidenced by electrophysiological studies , GTP - gamma - S coupling to 5 - HT1A autoreceptor and a lower hypothermic response to 5 - HT1A activation .
 Chemical: GTP - gamma - S
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: GTP - gamma - S