19067
Co - immunoprecipitation and pull - down studies showed that only Ca ( 2 + ) - bound calmodulin was able to bind DdCAD - 1 .
 Chemical: Ca ( 2 + )
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 + ) 
Answer:
 Chemical: Ca ( 2 + )