23377
In the present study , we use a synthetic ATP gamma S analogue that displays steric complementarity to the ATP - binding pocket and hence allows identification of protein substrates based on selective thiophosphorylation .
 Chemical: ATP
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: ATP