28172
Presynaptic CaMKII alpha modulates dopamine D3 receptor activation in striatonigral terminals of the rat brain in a Ca ( 2 + ) dependent manner .
 dopamine, Ca ( 2 + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 dopamine, Ca ( 2 + )