[gmx-users] Diffusion coefficient

[Dinesh Pinisetty]

Hello everybody,
      I have few questions about the diffusion coefficient.I have run a
simulation of a bilayer with mixture of 'A' and 'water' on either side of
the bilayer.Now how to find diffusion coefficient(D) of
1)'A'or'water' in the bilayer.
2)Am I right in saying that g_msd gives the D value of the all 'A'
molecules i.e. an average over bulk water phase and bilayer phase in 3-D.
  Any suggestions would be greatly appreciated.
Thanking you,
Yours sincerely,
Dinesh.