19152
The cAMP signaling system can trigger precise physiological cellular responses that depend on the fidelity of many protein - protein interactions , which act to bring together signaling intermediates at defined locations within cells .
 Chemical: cAMP
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: cAMP