8932
The requirement for AP1 activation suggested a role for the mitogen-activated protein kinase ( MAPK ) signaling pathway in regulating alpha2 integrin gene expression .
 ( protein: MAPK, None) , ( protein: AP1, None) , ( DNA: alpha2 integrin gene, None) , ( protein: mitogen-activated protein 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: MAPK, None) , ( protein: AP1, None) , ( DNA: alpha2 integrin gene, None) , ( protein: mitogen-activated protein kinase, None) 