) (PDB code 1LZ8) is available from the IUCr electronic archives (Reference: EA5014
). Services for accessing these data are described at the back of the journal.+Current address: CCLRC Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, UK.
++Current address: Institute of General and Ecological Chemistry, Technical University of Lodz, Zeromskiego 116, Poland.
3A supplementary table of these SnB-derived coordinates and the coordinates of the same set of atoms deposited by Dauter et al. (1999) (PDB code 1LZ8) is available from the IUCr electronic archives (Reference: EA5014
). Services for accessing these data are described at the back of the journal.