, Pro52, Arg188   
3.  Withanolide B  –5.67  69.79 µM  Ser139, Gly138, Lys137, Cys128, Glu290, Gln127, Tyr126, Val125  –8.3  845.65 nM  Leu287, Tyr239, Tyr237, Leu272, Leu286, Asn238, Thr199, Asp289, Glu288, Arg13