21006
The implications of Ca ( 2 + ) / Na ( + ) ion binding are discussed in terms of structure and possible modulation of core catalytic function .
 Chemical: Ca ( 2 + ); Chemical: Na ( + )
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: Ca ( 2 + ); Chemical: Na ( + )