14615
Although the assay involves the dramatic loss of red cell production , it should be possible to define important regulatory domains that can then be assayed using less stringent systems, such as cell-free extracts for in vitro transcription .
 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:
 None