11069
Sp family members preferentially interact with the promoter proximal repeat within the HTLV-I enhancer .
 HTLV-I enhancer, promoter proximal repeat, Sp family members
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:
 HTLV-I enhancer, promoter proximal repeat, Sp family members