711
Here, we report that PU.1 mRNA is upregulated during myeloid differentiation of human purified CD34+ cells and murine multipotential FDCP-mix A4 cells , suggesting that PU.1 is upregulated as an early event during differentiation of multipotential progenitor cells .
 ( RNA: PU.1 mRNA, None) , ( protein: PU.1, None) , ( cell line: human purified CD34+ cells, None) , ( cell type: multipotential progenitor cells, None) , ( protein: PU.1, None) , ( cell line: murine multipotential FDCP-mix A4 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: PU.1 mRNA, None) , ( protein: PU.1, None) , ( cell line: human purified CD34+ cells, None) , ( cell type: multipotential progenitor cells, None) , ( protein: PU.1, None) , ( cell line: murine multipotential FDCP-mix A4 cells, None) 