6071
RNA was extracted by phenol/chloroform and c-fos expression was analyzed by PCR assisted mRNA assay .
 ( RNA: RNA, None) , ( DNA: c-fos, 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:
 ( RNA: RNA, None) , ( DNA: c-fos, None) 