19259
It was observed that Rb1 increased the ratio of intracellular ATP to ADP concentration and intracellular Ca ( 2 ) ( + ) concentration .
 Rb1, ATP, ADP, Ca ( 2 ) ( + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Rb1, ATP, ADP, Ca ( 2 ) ( + )