13500
NFATx1 is expressed predominantly in the thymus and peripheral blood leukocyte , while the skeletal muscle expressed primarily NFATx2 .
 ( protein: NFATx1, None) , ( protein: NFATx2, None) , ( cell type: peripheral blood leukocyte, 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: NFATx1, None) , ( protein: NFATx2, None) , ( cell type: peripheral blood leukocyte, None) 