7238
This correlates with changes of nuclear protein-binding activities to two motifs, site alpha and beta , within the CD28 minimal promoter .
 ( protein: CD28, None) , ( DNA: CD28 minimal promoter, 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: CD28, None) , ( DNA: CD28 minimal promoter, None) 