14729
HIVs in which the NF-kappa B/Sp1 enhancer plus the downstream TATA element were replaced with heterologous enhancer/promoters were also constructed.
 downstream TATA element, NF-kappa B/Sp1 enhancer, heterologous enhancer/promoters
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:
 downstream TATA element, NF-kappa B/Sp1 enhancer, heterologous enhancer/promoters