4975
Furthermore, transient-cotransfection assay demonstrated that PU.1 (and not Elf-1 ) can transactivate the c-fes promoter in nonmyeloid cell lines .
 c-fes promoter, Elf-1, nonmyeloid cell lines, PU.1
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:
 c-fes promoter, Elf-1, nonmyeloid cell lines, PU.1