ER-α + DES (Diethylstilbestrol) + charge clamp and stabilzing residues

3ERD:

ASP351:A-LEU540:A H-bond  H3 - H12
LYS529:A-ASP545:A H-bond  H12 folds back on itself
GLU542:A-LYS688:C H-bond  |
LYS362:A-ASP696:C H-bond  |---- Charge Clamp
LYS362:A-LEU694:C H-bond  |