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Application of NAGly on GPR18 - expressing neurons did not inhibit calcium currents but instead potentiated currents in a voltage - dependent manner , similar to what has previously been reported ( Guo et al . , 2008 ; J Neurophysiol , 100 : 1147 ) .
 Chemical: NAGly; Chemical: calcium
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: NAGly; Chemical: calcium