8503
An electrophoretic mobility shift assay employing AP-1 and NF-kappaB consensus oligonucleotides was used to demonstrate that AP-1 -binding activity increased, while constitutive NF-kappaB -binding activity was not enhanced, following 2 h of CD19 cross-linking in 1E8 cells . Supershift experiments revealed that JunD and c-Fos proteins mediated anti- CD19 induced AP-1 -binding activity in 1E8 cells .
 ( protein: NF-kappaB, None) , ( protein: c-Fos proteins, None) , ( protein: NF-kappaB, None) , ( cell line: 1E8 cells, None) , ( cell line: 1E8 cells, None) , ( protein: AP-1, None) , ( protein: CD19, None) , ( protein: AP-1, None) , ( protein: CD19, None) , ( protein: AP-1, None) , ( protein: JunD, 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: NF-kappaB, None) , ( protein: c-Fos proteins, None) , ( protein: NF-kappaB, None) , ( cell line: 1E8 cells, None) , ( cell line: 1E8 cells, None) , ( protein: AP-1, None) , ( protein: CD19, None) , ( protein: AP-1, None) , ( protein: CD19, None) , ( protein: AP-1, None) , ( protein: JunD, None) 