458571.fig.006a
(a)
458571.fig.006b
(b)
Figure 6: Superposition of wild type structures corresponding to the internal aldimine (salmon; rcSHMT) and external aldimine (magenta; mcSHMT, pdb 1eji) forms of the cofactor with the glycine gem-diamine form of the wild type (slate) and T254A mutant (orange).