2249
A transcription start site is located approximately 4 kilobases 5' to the translation initiation codon , and an RNA splice of 3863 bases occurs in the 5'-untranslated region to generate mature HeLa cell mRNA .
 ( cell line: HeLa cell, None) , ( RNA: mature HeLa cell mRNA, None) , ( DNA: 5#$%#-untranslated region, None) , ( DNA: translation initiation codon, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: HeLa cell, None) , ( RNA: mature HeLa cell mRNA, None) , ( DNA: 5#$%#-untranslated region, None) , ( DNA: translation initiation codon, None) 