14436
When ligated to the proIL-1 beta cap site -proximal region (located between -131 to +12), both the proIL-1 beta and the simian virus 40 enhancer elements functioned more efficiently in monocytes than in HeLa cells , which are not normally competent for IL-1 beta expression .
 ( protein: proIL-1 beta, None) , ( DNA: cap site, None) , ( DNA: -proximal region, None) , ( protein: IL-1 beta, None) , ( cell type: monocytes, None) , ( DNA: proIL-1 beta cap site, None) , ( cell type: HeLa cells, 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:
 ( protein: proIL-1 beta, None) , ( DNA: cap site, None) , ( DNA: -proximal region, None) , ( protein: IL-1 beta, None) , ( cell type: monocytes, None) , ( DNA: proIL-1 beta cap site, None) , ( cell type: HeLa cells, None) 