1950
Expression of GATA-1 mRNA was almost constant during Hm -induced differentiation , but increased during Epo treatment .
 ( RNA: GATA-1 mRNA, None) , ( protein: Hm, None) , ( protein: Epo, 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: GATA-1 mRNA, None) , ( protein: Hm, None) , ( protein: Epo, None) 