3241
In this study, we isolated the genomic DNA for human IRF-2 gene , determined the intron-exon structure of the human IRF-2 gene , mapped the major transcription initiation site , identified a number of potential regulatory elements in the 5'-flanking region , and localized the IRF-2 gene on human chromosome 4 .
 human IRF-2 gene, human chromosome 4, genomic DNA, IRF-2, IRF-2, IRF-2, major transcription initiation site, intron-exon structure, human IRF-2 gene, IRF-2 gene, 5'-flanking region
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:
 human IRF-2 gene, human chromosome 4, genomic DNA, IRF-2, IRF-2, IRF-2, major transcription initiation site, intron-exon structure, human IRF-2 gene, IRF-2 gene, 5'-flanking region