13648
IL-7 did not maintain v-Abl -mediated differentiation arrest of the pre-B cells , as activation of NF-kappaB and RAG gene transcription was unaffected by IL-7 .
 ( DNA: RAG gene, None) , ( protein: IL-7, None) , ( cell type: pre-B cells, None) , ( protein: NF-kappaB, None) , ( protein: v-Abl, None) , ( protein: IL-7, 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:
 ( DNA: RAG gene, None) , ( protein: IL-7, None) , ( cell type: pre-B cells, None) , ( protein: NF-kappaB, None) , ( protein: v-Abl, None) , ( protein: IL-7, None) 