1522
Steel factor is one of the growth factors that controls the proliferation and differentiation of hematopoietic cells and SCL , also known as Tcl-5 or Tal-1 , is a transcription factor involved in erythropoiesis.
 ( protein: Steel factor, None) , ( protein: growth factors, None) , ( cell type: hematopoietic cells, None) , ( protein: transcription factor, None) , ( protein: Tal-1, None) , ( protein: SCL, None) , ( protein: Tcl-5, 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: Steel factor, None) , ( protein: growth factors, None) , ( cell type: hematopoietic cells, None) , ( protein: transcription factor, None) , ( protein: Tal-1, None) , ( protein: SCL, None) , ( protein: Tcl-5, None) 