9387
Using electrophoretic mobility shift assays , we found that in the presence of rabbit reticulocyte lysate , human ER reduced the binding activities of chicken immature erythrocyte nuclear extracted proteins to GATA and CACCC sites in the H5 promoter and enhancer .
 ( protein: human ER, None) , ( protein: chicken immature erythrocyte nuclear extracted proteins, 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: human ER, None) , ( protein: chicken immature erythrocyte nuclear extracted proteins, None) 