3020
High levels of Sp140 mRNA were detected in human spleen and peripheral blood leukocytes , but not other human tissues .
 ( RNA: Sp140 mRNA, None) , ( cell type: peripheral blood leukocytes, None) , ( protein: Sp140, 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:
 ( RNA: Sp140 mRNA, None) , ( cell type: peripheral blood leukocytes, None) , ( protein: Sp140, None) 