10012
Scatchard plot analysis revealed Kd values of 7.1 nM and 0.15 nM for (+)-pentazocine and SR 31747A , respectively, indicating an affinity of SR-BP 50-fold higher for SR 31747A than for pentazocine .
 ( protein: SR-BP, 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: SR-BP, None) 