2706
The molecular mass of these factors is approximately 28 kDa , and their DNA binding characteristics are indistinguishable from those of the novel nuclear factor MS-2 .
 ( protein: nuclear factor, None) , ( protein: MS-2, 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: nuclear factor, None) , ( protein: MS-2, None) 