7464
The relative low binding affinity of cleavage stimulation factor CstF-64 to the proximal polyA site seems to contribute to its neglect in naive T cells .
 ( DNA: proximal polyA site, None) , ( cell type: naive T cells, None) , ( protein: cleavage stimulation factor, None) , ( protein: CstF-64, 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:
 ( DNA: proximal polyA site, None) , ( cell type: naive T cells, None) , ( protein: cleavage stimulation factor, None) , ( protein: CstF-64, None) 