28185
These experiments show that in striatonigral projections , CaMKII alpha inhibits the action of D3 receptors in a Ca ( 2 + ) dependent manner blocking their modulatory effects on GABA release .
 Ca ( 2 + ), GABA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ca ( 2 + ), GABA