6243
Here , we show that both apo - CaM and Ca ( 2 + ) / CaM bind to the C - terminal tail of the neuronal channel Kv7 . 4 ( KCNQ4 ) , which is involved in both hearing and mechanosensation .
 Chemical: Ca ( 2 + ); Chemical: C
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ca ( 2 + ), C 
Answer:
 Chemical: Ca ( 2 + ); Chemical: C