10554
Constitutive expression of E2a- Pbx1 did not induce apoptosis or continued cycling of Rat-1 fibroblasts in low serum conditions .
 ( protein: Pbx1, None) , ( protein: E2a- Pbx1, None) , ( cell line: Rat-1 fibroblasts, 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: Pbx1, None) , ( protein: E2a- Pbx1, None) , ( cell line: Rat-1 fibroblasts, None) 