Fig. 5. The 3D structures of S. paucimobilis SPT in the internal aldimine (top, PDB: ; 2JG2) and external aldimine (bottom, PDB: ; 2W8J) forms. The active sites are shown, highlighting key residues. To highlight the dimeric nature of SPT, one of the SPT monomers is shown in ribbon form, whilst the other is shown as a surface representation. An overlay of the active sites in the internal and external aldimine forms is shown in Fig. 6.
