5088
Specifically, 9-cis-RA potently inhibited the growth of BFU-E response to erythropoietin ( Epo ) (100%), stem cell factor ( SCF ) + Epo (92%), IL-3 + Epo (97%), IL-4 + Epo (88%), and IL-9 + Epo (100%).
 ( protein: Epo, None) , ( protein: IL-9, None) , ( protein: Epo, None) , ( protein: IL-3, None) , ( protein: erythropoietin, None) , ( protein: SCF, None) , ( protein: Epo, None) , ( protein: Epo, None) , ( protein: Epo, None) , ( protein: IL-4, None) , ( protein: stem cell factor, 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:
 ( protein: Epo, None) , ( protein: IL-9, None) , ( protein: Epo, None) , ( protein: IL-3, None) , ( protein: erythropoietin, None) , ( protein: SCF, None) , ( protein: Epo, None) , ( protein: Epo, None) , ( protein: Epo, None) , ( protein: IL-4, None) , ( protein: stem cell factor, None) 