452
Isolation and sequencing of the first exon and 5'-flanking region of this gene reveal a TATA-less promoter with a high G + C content .
 ( DNA: first exon, None) , ( DNA: 5#$%#-flanking region, None) , ( DNA: TATA-less promoter, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: first exon, None) , ( DNA: 5#$%#-flanking region, None) , ( DNA: TATA-less promoter, None) 