What part of a testosterone molecule binds to the androgen receptor?

Question

?????

Answer 1

I found the structure of the receptor with dihydro testosterone:

http://www.ebi.ac.uk/thornton-srv/databases/cgi-bin/pdbsum/GetPage.pl?pdbcode=1t5z&template=ligands.html&l=1.1

or better seen

http://www.ebi.ac.uk/thornton-srv/databases/cgi-bin/pdbsum/RunLigplot.pl?pdb=1t5z&file=ligplot01_01&pdf=YES

If you have a special program for looking at structures the PDB number is 1t5z