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 .
 beta-casein, Ras, STAT5, CIS, OSM, beta-casein STAT5 element, RasN17, IL-2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 beta-casein, Ras, STAT5, CIS, OSM, beta-casein STAT5 element, RasN17, IL-2