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I think Garib or Alexei must answer this and they are both on holiday till the end of August Eleanor juergen J. Mueller wrote: > Dear all, > using refmac5 to provide H-atoms for a known protein structure the > distance between CYS-CG and HG is defined to 1.34 Ang. in CYS.cif. > > This distance has been critisiced by a non-CCP4 program > by > * Poor covalent bond length of 1.33954 for hydrogen atom HG. > > In an other library-file CSH.cif the same distance is defined to 1.1 Ang. > WHATIF uses 1.0 Ang. What is the most correct one? > Could the CCP4-people comment on this? > > (Of course I know hydrogens will not be refined but they are > neccessary for some > modeling programs). > > Thank you, > Juergen > >