4126
While the maternally derived X chromosome was preferentially active in the asymptomatic twin , the paternal X chromosome was active in the other, affected twin and was found in her hemizygotic nephew .
 ( DNA: paternal X chromosome, None) , ( DNA: maternally derived X chromosome, None) , ( DNA: X chromosome, None) , ( DNA: X chromosome, 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: paternal X chromosome, None) , ( DNA: maternally derived X chromosome, None) , ( DNA: X chromosome, None) , ( DNA: X chromosome, None) 