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We further show that arsenic compromises ATP - mediated Ca ( 2 + ) signaling by altering both Ca ( 2 + ) release from intracellular stores ( via metabotropic P2Y receptors ) and Ca ( 2 + ) influx mechanisms ( via ionotropic P2X receptors ) .
 Chemical: arsenic; Chemical: ATP; Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + )
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: arsenic; Chemical: ATP; Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + )