... Department of Biological Sciences, University of Warwick, Coventry, UK2 Department of Biochemistry, University of Oxford, UK3 School of Health and Medicine, Division of Biomedical and Life Sciences, ... differentorganisms and organelles. Some eukaryotes (landplants and various protists) use the multicomponent System I [also called the cytochrome c maturation(Ccm) system] , and others (animals, fungi, and ... axial ligand coordination and hydrogen bonds. Sulfuratoms (in methionine and cysteine) are colored yellow, nitrogenblue, oxygen red, and iron purple. The methyl group of the alanine of the AXXCH...