Transition elements are the main component of the active centers found in many proteins. The active centers of these proteins consists of the transition element atom linked to nitrogen atoms or oxygen or sulfur arising from some amino acids The active centers formed naturally in the biological processes to do a very distinctive job under physiological conditions for each protein, such as converting nitrogen to ammonia or fixing atmospheric nitrogen in order to be available to the plant. It was therefore necessary to find several attempts to identify the composition of the active centers and...