2206
Reverse transcriptase-polymerase chain reaction was used to examine HB9 RNA transcripts in hematopoietic cell lines .
 ( RNA: HB9 RNA transcripts, None) , ( cell line: hematopoietic cell lines, None) , ( DNA: HB9, 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:
 ( RNA: HB9 RNA transcripts, None) , ( cell line: hematopoietic cell lines, None) , ( DNA: HB9, None) 