Fig 7. Characterization of GrUAS.
The effects of temperature and pH on the activity of recombinant GrUAS. (A) Maximum activity of GrUAS is at 37°C. (B) Maximum activity of GrUAS is in Tris-HCl at a pH of 8.1. (C) Size-exclusion chromatography suggests recombinant GrUAS is active as dimer. The relative activity (indicated by closed diamonds) was determined by HPLC. The molecular weight of the enzyme in solution is based on the relative elution times of standard protein markers (indicated by open circles).