28175
In this study we examined whether the presynaptic effects of D3 receptor stimulation in the substantia nigra reticulata ( SNr ) are modulated by Ca ( 2 + ) activation of CaMKII alpha .
 Chemical: Ca ( 2 + )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ca ( 2 + ) 
Answer:
 Chemical: Ca ( 2 + )