2371
Furthermore the number of binding sites determined using [3H]dihydrotestosterone , [3H]RU-1881 , or [3H] testosterone were comparable.
 ( protein: binding sites, 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: binding sites, None) 