6345
To better understand the assembly mechanism for the progesterone receptor ( PR ), we have developed cell-free systems for studying interactions of PR , hsp90 , and other associated proteins .
 ( protein: progesterone receptor, None) , ( protein: PR, None) , ( protein: associated proteins, None) , ( protein: PR, None) , ( protein: hsp90, 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: progesterone receptor, None) , ( protein: PR, None) , ( protein: associated proteins, None) , ( protein: PR, None) , ( protein: hsp90, None) 