GlgS is structurally similar to a fragment from the tetratricopeptide repeats domain from protein phosphatase 5. (A) Ribbon representation of the backbone superposition of GlgS and TPRD using 38 residues results in root mean square deviation of 2.0 Å. GlgS is shown in red, TPRD in cyan. The figure was generated using MOLSCRIPT  and Raster3D . (B) Sequence alignment of TPRD and GlgS with secondary structure elements shown. Homologous residues are in bold.