13944
Furthermore, HL-60 cells transduced with a bcl-2 expression vector showed the same differentiation response to retinoids as did parental HL-60 cells even though apoptosis was inhibited in these bcl-2-transduced cells , suggesting that differentiation and apoptosis are regulated independently in myeloid leukemic cells .
 ( cell line: bcl-2-transduced cells, None) , ( cell line: parental HL-60 cells, None) , ( cell line: HL-60 cells, None) , ( cell type: myeloid leukemic cells, None) , ( cell line: HL-60 cells, None) , ( DNA: bcl-2 expression vector, 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 line: bcl-2-transduced cells, None) , ( cell line: parental HL-60 cells, None) , ( cell line: HL-60 cells, None) , ( cell type: myeloid leukemic cells, None) , ( cell line: HL-60 cells, None) , ( DNA: bcl-2 expression vector, None) 