Re: [gmx-users] Difference in Hydrogen Bond Lifetimes on truncating trajectory and also on using pbc

2017-08-29 Thread Erik Marklund
Dear Apramita, Right. Still, the same still applies with regards to the -666. It could be a matter of statistics, why you get sensible values for the longer trajectory chunk. Also, note that the trajectory length limits the possible timescales that the model can tease out. If I understand

Re: [gmx-users] Difference in Hydrogen Bond Lifetimes on truncating trajectory and also on using pbc

2017-08-29 Thread Apramita Chand
Dear Eric, Its actually the DG(kj/mol) value which is -666. The time is coming to be-126 ps. But the g_hbond is failing to fit the kinetic model to the data for the last 60ns as you have implied. Any reasons why this could have happened, while for the entire trajectory, I am getting positive

[gmx-users] Difference in Hydrogen Bond Lifetimes on truncating trajectory and also on using pbc

2017-08-28 Thread Apramita Chand
Dear All, I've carried out a 100ns simulation of protein in water and want to calculate hydrogen bond (forward) lifetime between Protein-Water. Initially, I thought it would be better to analyse hydrogen bonds in last 60ns of simulation, so I truncated the trajectory using g_trjconv using -b 4