1249
In recent investigations, using serum-free grown HL60 cells , we observed that all-trans RA , at 10(-7) M, did not induce neutrophil differentiation and that all-trans RA , at 10(-8) M, reduced the D3 concentration required for monocyte differentiation to 5 x 10(-9) M.
 ( cell line: serum-free grown HL60 cells, None) , ( cell line: HL60 cells, None) , ( cell type: monocyte, 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: serum-free grown HL60 cells, None) , ( cell line: HL60 cells, None) , ( cell type: monocyte, None) 