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 .
 RAG gene, IL-7, pre-B cells, NF-kappaB, v-Abl, IL-7
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:
 RAG gene, IL-7, pre-B cells, NF-kappaB, v-Abl, IL-7