19353
Compartmentalization of cAMP in space and time , maintained by A - kinase anchoring proteins , phosphodiesterases , and beta - arrestins , contributes to the Epac signalosome of small GTPases , phospholipases , mitogen - and lipid - activated kinases , and transcription factors .
 cAMP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cAMP