6241
All these motifs are strikingly conserved in sequence and placement relative to the previously characterized murine B29 promoter .
 murine B29 promoter, B29
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:
 murine B29 promoter, B29