1348
Missense mutation in exon 7 of the common gamma chain gene causes a moderate form of X-linked combined immunodeficiency .
 ( DNA: exon 7, None) , ( DNA: common gamma chain gene, 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: exon 7, None) , ( DNA: common gamma chain gene, None) 