10559
A combination of differential splicing and alternative use of promoters generates four mRNA isoforms , of 2.6 kb and 1.3-1.5 kb in size.
 ( DNA: promoters, None) , ( RNA: mRNA, None) , ( RNA: mRNA isoforms, 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: promoters, None) , ( RNA: mRNA, None) , ( RNA: mRNA isoforms, None) 