4099
Self renewal of normal erythroid progenitors is induced by the receptor tyrosine kinase c-ErbB , whereas other receptors ( c-Kit/Epo-R ) regulate erythroid differentiation .
 ( protein: receptor tyrosine kinase, None) , ( protein: c-Kit/Epo-R, None) , ( protein: receptors, None) , ( protein: c-ErbB, None) , ( cell type: erythroid progenitors, 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: receptor tyrosine kinase, None) , ( protein: c-Kit/Epo-R, None) , ( protein: receptors, None) , ( protein: c-ErbB, None) , ( cell type: erythroid progenitors, None) 