Evaluation of Bacterial Genomes Starts to Unravel Complex Tale of Metabolic Evolution As any biochemist knows, genetic change is chemical change really, and so it follows that if you want to really observe how evolution happens, you need to observe how it affects biochemistry. A genetic analysis looking for the evolutionary history of nitrogenase, the essential enzyme system that helps life use atmospheric nitrogen, shows some interesting evolutionary relationships between the key metabolic procedures of bacteria, and revealed some mystical new chemical substance pathways that aren’t yet understood. In a paper published in the current issue of the journal Molecular Biology and Evolution , Arizona Condition University biochemists Jason Raymond, Christopher Staples and Robert Blankenship and Rice University’s Janet Siefert do an evaluation of the genomes of a big group of bacteria and archaea, comparing specifically similar genes that make the protein nitrogenase kjøpe here .