OXIDOREDUCTASE, COPPER, ELECTRON TRANSPORT, FORMYLATION, HEME, IRON, MEMBRANE, MITOCHONDRION, MITOCHONDRION INNER MEMBRANE, RESPIRATORY CHAIN, TRANSMEMBRANE, TRANSPORT, ACETYLATION, TRANSIT PEPTIDE, ZINC, ISOPEPTIDE BOND, UBL CONJUGATION BOVINE HEART CYTOCHROME C OXIDASE IN THE NITRIC OXIDE-BOUND FULLY REDUCED STATE AT 100 K 3AG3