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Although it has been postulated that pituitary endocrine cells and pancreatic endocrine beta-cells share identical Pan/E2A complexes , native-Western analyses of pituitary and endocrine beta-cells detect Pan proteins in distinct cell type-specific complexes .
 ( protein: Pan/E2A complexes, None) , ( cell type: pancreatic endocrine beta-cells, None) , ( protein: Pan proteins, None) , ( cell type: endocrine beta-cells, None) , ( protein: cell type-specific complexes, None) , ( cell type: pituitary endocrine cells, 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: Pan/E2A complexes, None) , ( cell type: pancreatic endocrine beta-cells, None) , ( protein: Pan proteins, None) , ( cell type: endocrine beta-cells, None) , ( protein: cell type-specific complexes, None) , ( cell type: pituitary endocrine cells, None) 