12807
IL-2 -induced beta-casein expression was enhanced by dexamethasone, and this synergistic effect of Dexamethasone requires the sequence between -155 and -193 in the beta-casein promoter .
 ( protein: IL-2, None) , ( protein: beta-casein, None) , ( protein: beta-casein, None) , ( DNA: beta-casein promoter, None) , ( DNA: -155 and -193, 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: IL-2, None) , ( protein: beta-casein, None) , ( protein: beta-casein, None) , ( DNA: beta-casein promoter, None) , ( DNA: -155 and -193, None) 