10304
The prolactin receptor , a member of the hematopoietin/cytokine receptor superfamily , is ubiquitously expressed by cells in the immune system .
 ( protein: hematopoietin/cytokine receptor superfamily, None) , ( protein: prolactin receptor, 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: hematopoietin/cytokine receptor superfamily, None) , ( protein: prolactin receptor, None) 