PDB-4jfj: Increasing the Efficiency Efficiency of Ligands for the FK506-Binding Protein 51 by Conformational Control: Complex of FKBP51 with compound (1S,6R)-10-(1,3-benzothiazol-6-ylsulfonyl)-3-[2-(3,4-dimethoxyphenoxy)ethyl]-3,10-diazabicyclo[4.3.1]decan-2-one