Figure 4From: Rhodobacter capsulatus porphobilinogen synthase, a high activity metal ion independent hexamerpH Rate Profile. The pH rate profile is presented at 10 mM ALA in BTP-HCl in the presence (○) and absence (□) of 0.1 M KCl. Protein was 15 μg ml-1. The Km (filled tringle) and Vmax (filled circle) values as a function of pH at (0.15 μg ml-1) are given in units of mM and A555, respectively.Back to article page