Definition of cytochrome in US English:



  • Any of a number of compounds consisting of heme bonded to a protein. Cytochromes function as electron transfer agents in many metabolic pathways, especially cellular respiration.

    • ‘Hemoglobin, myoglobin, cytochromes, and other proteins are involved in oxygen transport and utilization.’
    • ‘Iron is used in actively proliferating cells for cytochrome and DNA synthesis.’
    • ‘Respiration in wheat endosperm was measured together with the activities of citrate synthase and cytochrome oxidase.’
    • ‘The majority of iron in humans is located in the porphyrin ring of heme that is incorporated into proteins and enzymes such as myoglobin, hemoglobin, cytochromes, catalases, and peroxidases.’
    • ‘Our first protein target was cytochrome c because it contains a positively charged surface made up of several lysine and arginine residues.’