Fig. 3.

C-termini of DsrC proteins. (a) Alignment of the C-termini of the DsrC/TusE/RspA family. The strictly conserved cysteine and the identified conserved motif only present in DsrC(-like) proteins and absent in TusE/RspA proteins [26] are shown. (b) Structural alignment of oxidative-type DsrC protein from Allochromatium vinosum (light blue, PDB code 1YX3) and reductive-type DsrC protein from Archaeoglobus fulgidus (pink, PDB code 1SAU). The C-termini are indicated with red and dark blue; cysteines are represented as sticks and the sulphur atoms in yellow.