1649
By extensive nucleotide sequence and Northern blot analysis , these cDNA clones were found to originate from approximately 42 different genes ( HZF 1-42 ) of which only 8 have previously been described.
 ( DNA: cDNA clones, None) , ( DNA: HZF 1-42, 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: cDNA clones, None) , ( DNA: HZF 1-42, None) 