3849
The CRE site in the bcl-2 promoter appears to play a major role in the induction of bcl-2 expression during the activation of mature B cells and during the rescue of immature B cells from apoptosis.
 ( cell type: immature B cells, None) , ( DNA: CRE site, None) , ( DNA: bcl-2 promoter, None) , ( cell type: mature B cells, None) , ( cell type: B cells, None) , ( protein: bcl-2, None) , ( cell type: B 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:
 ( cell type: immature B cells, None) , ( DNA: CRE site, None) , ( DNA: bcl-2 promoter, None) , ( cell type: mature B cells, None) , ( cell type: B cells, None) , ( protein: bcl-2, None) , ( cell type: B cells, None) 