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; protein: steroid binding sites; protein: binding sites; cell type: genital skin fibroblast; protein: binding sites; protein: androgen receptors
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: binding sites, steroid binding sites, binding sites, genital skin fibroblast, binding sites, androgen receptors 
Answer:
 protein: binding sites; protein: steroid binding sites; protein: binding sites; cell type: genital skin fibroblast; protein: binding sites; protein: androgen receptors