6017
The cloned cell lines are derived from 12-day fetal liver and are transformed with a truncated form of c-myb , which lacks the normal autoregulatory sequences .
 ( DNA: autoregulatory sequences, None) , ( DNA: c-myb, None) , ( cell line: cloned cell lines, 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:
 ( DNA: autoregulatory sequences, None) , ( DNA: c-myb, None) , ( cell line: cloned cell lines, None) 