Dear all,

There is a dimer in the asymmetric unit of a structure, and applying the
symmetric operator (-X+2/3,-X+Y+1/3,-Z+1/3) can generate a tetramer, which
is a biological assembly. When I deposit the structure to PDB, I need to
provide a matrix to generate the biological assembly. Is the following
matrix correct for pdb format?
-1 0 0 0.6667
-1 1 0 0.3333
 0 0 -1 0.3333

Another question is that I can use "Calculate --> Modelling --> New
molecule from symmetry op..." to generate new molecule in wincoot0.9.8.
However, I cannot find similar function in new wincoot1.18. I also found
that many useful functions in "Calculate --> Modelling" of coot0.9.8 are
not available in coot1. Will they come back in the following versions of
coot1?

Thanks and best regards,

Qixu Cai
Email: [email protected]

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