2964
We conclude from these results that the state - dependent salt bridge switching from Arg290 / Glu167 to Arg290 / ATP fulfills a dual role : to destabilize the closed state of the receptor and to promote the ionic coordination of ATP in the ATP - binding pocket .
 Chemical: Arg290; Chemical: Glu167; Chemical: Arg290; Chemical: ATP; Chemical: ATP; Chemical: ATP
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: Arg290, Glu167, Arg290, ATP, ATP, ATP 
Answer:
 Chemical: Arg290; Chemical: Glu167; Chemical: Arg290; Chemical: ATP; Chemical: ATP; Chemical: ATP