3457
Seven point mutations were introduced into the conserved motif in the second extracellular loop ( ECII ) of EP3 , resulting in acquisition of GTP - sensitive agonist binding .
 Chemical: GTP
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