Figure 5 Comparison of the trimeric structures of MPS (a) and DDG aldolase (b) related by a crystallographic threefold axis. Each flexible loop coloured in magenta (there are helical parts in this region of DDG aldolase) is joined to the active site of the next protomer. The C-terminal long -helices (green) and core -barrels (blue) are also highlighted, along with the magnesium ion (red).

© International Union of Crystallography 2004