8307
We have previously shown that protein kinase C ( PKC ) activation (with phorbol ester ( PMA ) alone) specifically induces differentiation of primary human CD34+ hemopoietic progenitor cells ( HPC ) to mature DC .
 ( cell line: HPC, None) , ( cell line: primary human CD34+ hemopoietic progenitor cells, None) , ( protein: protein kinase C, None) , ( protein: PKC, None) , ( cell type: mature DC, 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:
 ( cell line: HPC, None) , ( cell line: primary human CD34+ hemopoietic progenitor cells, None) , ( protein: protein kinase C, None) , ( protein: PKC, None) , ( cell type: mature DC, None) 