12810
In apparent contradiction, expression of a dominant negative form of Ras , RasN17 , also inhibited IL-2 -induced activation of the promoter containing the minimal beta-casein STAT5 element as well as the promoters of CIS and OSM .
 ( protein: beta-casein, None) , ( protein: Ras, None) , ( protein: STAT5, None) , ( protein: CIS, None) , ( protein: OSM, None) , ( DNA: beta-casein STAT5 element, None) , ( protein: RasN17, None) , ( protein: IL-2, 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: beta-casein, None) , ( protein: Ras, None) , ( protein: STAT5, None) , ( protein: CIS, None) , ( protein: OSM, None) , ( DNA: beta-casein STAT5 element, None) , ( protein: RasN17, None) , ( protein: IL-2, None) 