3516
B lymphocytes from the peripheral blood of patients with chronic lymphocytic leukaemia ( CLL ) were analysed for the nuclear presence and DNA binding of a panel of transcription factors which are involved in the gene control of lymphoid cells .
 ( cell type: lymphoid cells, None) , ( protein: transcription factors, None) , ( cell type: B lymphocytes, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: lymphoid cells, None) , ( protein: transcription factors, None) , ( cell type: B lymphocytes, None) 