6857
Wild-type (wt) cells were inducible either by the tryptophan photoproduct 6-formylindolo[3,2-b]carbazole ( FICZ ) or by UV -irradiation but very low or undetectable levels were observed in the c12 cells .
 ( cell line: Wild-type (wt) cells, None) , ( cell type: c12 cells, 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: Wild-type (wt) cells, None) , ( cell type: c12 cells, None) 