cytochrome c oxidase from the inner membrane of yeast mitochondria consists of seven nonidentical protein subunits , three being synthesized on mitochondrial ribosomes ( molecular weights i : 43 k , ii : 34 k , and iii : 24 k ) and four being made on cytoplasmic ribosomes ( molecular weights iv : 14 k , v : 12 k , vi : 12 k , and vii : 4.5 k ) .
C0230840
inner membrane of
C0010834
cytoplasmic