6862
Here we show that the lymphoid lineage-determining factors Ikaros and Aiolos can function as strong transcriptional repressors .
 ( protein: Ikaros, None) , ( protein: strong transcriptional repressors, None) , ( protein: lymphoid lineage-determining factors, None) , ( protein: Aiolos, 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: Ikaros, None) , ( protein: strong transcriptional repressors, None) , ( protein: lymphoid lineage-determining factors, None) , ( protein: Aiolos, None) 