14243
Methylation interference analysis of the -65 region identified a pattern of contacts with nuclear factors resembling that for NF-Y , and an NF-Y -binding site and the proximal TSP 1 element cross-competed in gel-shift assays , whereas their binding mutants did not.
 -65 region, NF-Y, NF-Y -binding site, NF-Y, binding mutants, nuclear factors, proximal TSP 1 element
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:
 -65 region, NF-Y, NF-Y -binding site, NF-Y, binding mutants, nuclear factors, proximal TSP 1 element