I have calculated binding free energy of two proteins using both MMPBSA.py and mm_pbsa.pl script.I am using 500 frames generated during 1ns simualation under NPT condition.In case of MMPBSA.py i am getting very less Delta G with large value of standard deviation while for same complex mm_pbsa is giving good value of Delta G. I am confused with these values, whether to trust or not.Please suggest me any solution.

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