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We evaluated its anticancer potential by studying its effect on mitochondrial membrane potential , intracellular calcium levels [ Ca ( 2 + ) ] ( i ) , cell membrane integrity , apoptotic body formation and DNA fragmentation in cultured HepG2 cells .
 Chemical: calcium; 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: calcium; Chemical: Ca ( 2 + )