8933
Inhibition of the MAP kinase cascade with PD98059 , a specific inhibitor of MAPK kinase 1 , prevented the expression of the alpha2 integrin subunit in cells induced to become megakaryocytic.
 ( protein: alpha2 integrin subunit, None) , ( protein: MAPK kinase 1, None) , ( protein: MAP kinase, 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: alpha2 integrin subunit, None) , ( protein: MAPK kinase 1, None) , ( protein: MAP kinase, None) 