14781
The two lines also expressed comparable levels of Epo-R mRNA while the number of Epo -binding sites on UT-7 Epo cells was one-sixth the number of UT-7 cells (2400 +/- 3 vs. 13,800 +/- 300).
 ( RNA: Epo-R mRNA, None) , ( cell line: UT-7 Epo cells, None) , ( protein: Epo, None) , ( cell line: UT-7 cells, 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: Epo-R mRNA, None) , ( cell line: UT-7 Epo cells, None) , ( protein: Epo, None) , ( cell line: UT-7 cells, None) 