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Therefore we analysed the expression of E2F -DNA binding activity and the constituent proteins found in the complexes in human primary haemopoietic cells of various lineages.
 human primary haemopoietic cells, E2F
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:
 human primary haemopoietic cells, E2F