8183
RA receptor activation appears critical to regulating important aspects of hematopoiesis , since transducing a COOH-terminally truncated RARalpha exhibiting dominant-negative activity ( RARalpha403 ) into normal mouse bone marrow generates hematopoietic growth factor-dependent cell lines frozen at the multipotent progenitor (EML) or committed promyelocyte (MPRO) stages .
 ( protein: RARalpha403, None) , ( cell line: hematopoietic growth factor-dependent cell lines, None) , ( protein: COOH-terminally truncated RARalpha, 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: RARalpha403, None) , ( cell line: hematopoietic growth factor-dependent cell lines, None) , ( protein: COOH-terminally truncated RARalpha, None) 