Biogenesis of mitochondrial cytochrome c oxidase (COX) is a complex process involving the coordinate expression and assembly of numerous subunits (SU) of dual genetic origin. Moreover. several auxiliary factors are required to recruit and insert the redox-active metal compounds. which in most cases are buried in their protein scaffold deep inside the membrane. https://www.marcelovicente.com/product-category/5n-85n-lightest-neutral-brown/