2627
More frequent use of the classical Oct2a and Oct2b isoforms was observed in the lipopolysaccharide -stimulated B cells , while a preference for the Oct2ab and Oct2ba isoforms was observed in lipopolysaccharide plus phorbol-di-butyrate -treated cells .
 ( protein: Oct2ab, None) , ( protein: Oct2ba, None) , ( cell line: lipopolysaccharide plus phorbol-di-butyrate -treated cells, None) , ( protein: Oct2a, None) , ( cell line: lipopolysaccharide -stimulated B cells, None) , ( protein: Oct2b, 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: Oct2ab, None) , ( protein: Oct2ba, None) , ( cell line: lipopolysaccharide plus phorbol-di-butyrate -treated cells, None) , ( protein: Oct2a, None) , ( cell line: lipopolysaccharide -stimulated B cells, None) , ( protein: Oct2b, None) 