523
The N element could independently mediate low levels of transcription in both B-cell and HeLa-cell extracts , and, in conjunction with the octamer element , it can promote high levels of transcription in B-cell extracts .
 DNA: N element; DNA: octamer element
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: N element; DNA: octamer element