14202
Human peripheral blood monocytes ( Mo ) constitutively display the beta-chain of the receptor for IL-2 , whereas expression of the IL-2R alpha-chain is not constitutive but inducible with IL-2 .
 ( cell type: Human peripheral blood monocytes, None) , ( protein: IL-2, None) , ( cell type: Mo, None) , ( protein: IL-2R alpha-chain, None) , ( protein: IL-2, 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:
 ( cell type: Human peripheral blood monocytes, None) , ( protein: IL-2, None) , ( cell type: Mo, None) , ( protein: IL-2R alpha-chain, None) , ( protein: IL-2, None) 