Genetic change is chemical change really.

Evaluation of Bacterial Genomes Starts to Unravel Complex Story 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 searching for the evolutionary history of nitrogenase, the important enzyme system that helps life make use of atmospheric nitrogen, has shown some interesting evolutionary human relationships between the key metabolic processes of bacteria, and revealed some mysterious new chemical pathways that aren’t yet understood. In a paper published in the current problem of the journal Molecular Biology and Evolution , Arizona Condition University biochemists Jason Raymond, Christopher Staples and Robert Blankenship and Rice University’s Janet Siefert perform an analysis of the genomes of a big group of bacteria and archaea, comparing in particular similar genes that produce the protein nitrogenase enzyme 5-alpha reductase .