10923
Dose-dependence studies using histamine and dimaprit showed that the EC50 values for cAMP production and c-fos increase were similar, suggesting that cAMP might be involved in c-fos induction via H2 receptors .
 ( DNA: c-fos, None) , ( protein: H2 receptors, None) , ( DNA: c-fos, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: c-fos, None) , ( protein: H2 receptors, None) , ( DNA: c-fos, None) 