15160
Furthermore , the D2R - mediated induction of GDNF and Zif268 expression was dependent on G beta gamma - mediated signaling and activation of extracellular signal - regulated kinase 1 / 2 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None