2370
The binding sites fulfil the required criteria for specific steroid binding sites however differ somewhat from the classic androgen receptors from genital skin fibroblast : in fertile adult males (n = 20) the binding sites showed (1) a high affinity for testosterone (1.32 +/- 0.49 nM; mean +/- SD), (2) a saturable capacity (184 +/- 52 binding sites per cell; mean +/- SD), and (3) a characteristic competitive binding profile for other steroid hormones (relative binding affinities: testosterone = dihydrotestosterone > 17 beta-estradiol > progesterone , whereas aldosterone, 17-hydroxy-progesterone and cortisol did not compete appreciably).
 ( protein: binding sites, None) , ( protein: steroid binding sites, None) , ( protein: binding sites, None) , ( cell type: genital skin fibroblast, None) , ( protein: binding sites, None) , ( protein: androgen receptors, 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) , ( protein: steroid binding sites, None) , ( protein: binding sites, None) , ( cell type: genital skin fibroblast, None) , ( protein: binding sites, None) , ( protein: androgen receptors, None) 