Hi Edward,
For dimers, unfortunately I don't have much advice I can give. The only person who could we be the one who derives the correct theoretical treatment of dimers in the future. You may have avoided the issue though if you have a perfectly symmetrical dimer.
OK
It won't give much, but the bond vectors orientations are different between two monomers. The superimposition is not perfect. But, as we have discussed before on the list, it will not do anything for the theoretical problem, if you indeed do have a problem. It will only show you any small bond vector orientation artefacts.
OK
I am also unaware of any theoretical treatment. If you deposit your dynamics data for your publication in the BMRB, via the relax export functions, then this might open a door to allow a theoretician in the future to use real data for solving this problem.
we will do so
As for solving the problem now and you are 100% sure that this is not already solved, unless you would like to dive into quite complex theory, then there is nothing we can do. You could make a 1 line comment about the deficiency in the manuscript, and make the statement that this is an unsolved problem.
we will do so
Anyway, the perfect symmetry might mean that the diffusion tensor as seen in the reference frame of each monomer is identical, so that the bond vectors in each experience the same 5 global correlation times and hence the standard analysis will work perfectly. If so, no special theory is required.
OK got it. Thanks, Stefano