Coordinated iron and copper ions serve vital rolls in the enzyme complexes of the respiratory chain. One important type of prosthetic group are iron-sulfur clusters in which iron is coordinated to sulfhydral groups of cycsteine as well as inorganic sulfides. In these groups the iron atoms interchange from the reduced form, Fe2+ , to the oxidized form, Fe3+. Three of the enzyme complexes of the respiratory chain are cytochromes, which means they are electron transferring proteins containing heme groups. A heme group consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin. Reduction of the iron corresponds to electron delocalization over the entire porphyrin network.
The WikiPremed MCAT Course is a comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum. Please read our policies on Privacy and Shipping & Returns. Contact Us. MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course. WikiPremed offers the customers of our publications or our teaching services no guarantees regarding eventual performance on the MCAT.
WikiPremed is a trademark of Wisebridge Learning Systems LLC. The work of WikiPremed is published under a Creative Commons Attribution NonCommercial ShareAlike License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions.