[gmx-users] frame with lowest energy

[Sana Saeed]

hello gromacs users and experts,
i have performed 10ns complex simulation of Protein and ligand-complex, now i need the best conformation for further analysis (alchemical analysis: binding free energy simulations). i want to choose best initial structure for further study. how would i know which frame has lowest energy? i studied gmx energy tool but couldn't find way. 
Thanks in advance.
 Sana Saeed Khan,
Research Assistant
Chemoinformatics Lab
Graduate Student, MS bioinformatics
Department of Bioinformatics
Soongsil University, Seoul, South Korea.