7716
However, Spi-C may represent a novel subgroup within the Ets protein family , as it differed significantly from Spi-B and PU.1 within helix 1 of the Ets domain .
 ( protein: helix 1, None) , ( protein: Ets protein family, None) , ( protein: Ets domain, None) , ( protein: Spi-B, None) , ( protein: PU.1, None) , ( protein: Spi-C, None) , ( protein: Ets protein, 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: helix 1, None) , ( protein: Ets protein family, None) , ( protein: Ets domain, None) , ( protein: Spi-B, None) , ( protein: PU.1, None) , ( protein: Spi-C, None) , ( protein: Ets protein, None) 