Characterization of Rhodobacter capsulatus and barley (Hordeum vulgare L.) magnesium chelatases
Magnesium chelatase is a heterotrimeric enzyme complex, which catalyzes the insertion of Mg2+ into protoporphyrin IX. The enzyme is composed of three protein subunits BchI, BchD and BchH of approximately 40, 70 and 140 kDa, respectively. In barley (Hordeum vulgare L.) the subunits are referred to as Xantha-H, Xantha-G and Xantha-F. In this study, genes encoding the magnesium chelatase subunits of