14127
In this report, it is demonstrated that Elf-1 contains a sequence motif that is highly related to the Rb binding sites of several viral oncoproteins and binds to the pocket region of Rb both in vitro and in vivo.
 ( protein: Rb, None) , ( protein: Elf-1, None) , ( protein: Rb binding sites, None) , ( protein: oncoproteins, 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: Rb, None) , ( protein: Elf-1, None) , ( protein: Rb binding sites, None) , ( protein: oncoproteins, None) 