427
The CK-1 /CD28RE of GM-CSF shows a high degree of similarity to the IL-2 CD28RE and the IL-3 gene also contains a related region.
 ( DNA: CK-1, None) , ( DNA: CD28RE, None) , ( protein: IL-2, None) , ( DNA: IL-3 gene, None) , ( DNA: /CD28RE, None) , ( protein: GM-CSF, 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: CK-1, None) , ( DNA: CD28RE, None) , ( protein: IL-2, None) , ( DNA: IL-3 gene, None) , ( DNA: /CD28RE, None) , ( protein: GM-CSF, None) 