Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of a class of usually colored proteins that contain a heme group, are electron carriers, and catalyze oxidation-reduction reactions during cellular respiration.

from The Century Dictionary.

  • In neural., a name given by Nissl to the so-called ‘granules,’ or nerve-cells with scanty cytoplasm incompletely surrounding a small nucleus which does not exceed in size the nucleus of an ordinary leucocyte or neuroglia cell: opposed to *caryochrome cell which has a larger nucleus.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of various related hemoproteins found in the cells of most organisms, which are an important part of cell respiration.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From cyto- + Ancient Greek χρῶμα (khrōma, "colour").

Examples

  • Researchers found differences in 10 genes around an enzyme called cytochrome P450 1b1, which is known to break down estrogen and tobacco smoke.

    Lung Cancer in Women on the Rise

  • Humans have an enzyme called cytochrome P450 3A4 that helps to metabolize calcium channel blockers and clear them from the system.

    The Seattle Times

  • They all belong to a major family of enzymes called cytochrome P450 that act as a catalyst for a broad range of chemical reactions and are implicated in pesticide resistance in other insect species.

    Why Bedbugs Won't Die

  • DavidDP at 7.27: ever come across something called cytochrome C?

    John Terry’s sacking as England captain tells us something interesting...

  • During Phase I detox at least 120 members of the enzyme family known as cytochrome P450s pretreat the hundreds of thousands of toxins that your body encounters every day.

    The Source

  • During Phase I detox at least 120 members of the enzyme family known as cytochrome P450s pretreat the hundreds of thousands of toxins that your body encounters every day.

    The Source

  • A relatively new drug, atovaquone, which interfered with a different step in P. falciparum metabolism, can be countered by a single amino acid mutation in a protein called cytochrome b.3 The very latest drug, artemisinin, is derived from the Chinese sweet wormwood plant.

    The Edge of Evolution

  • A relatively new drug, atovaquone, which interfered with a different step in P. falciparum metabolism, can be countered by a single amino acid mutation in a protein called cytochrome b.3 The very latest drug, artemisinin, is derived from the Chinese sweet wormwood plant.

    The Edge of Evolution

  • A relatively new drug, atovaquone, which interfered with a different step in P. falciparum metabolism, can be countered by a single amino acid mutation in a protein called cytochrome b.3 The very latest drug, artemisinin, is derived from the Chinese sweet wormwood plant.

    The Edge of Evolution

  • A relatively new drug, atovaquone, which interfered with a different step in P. falciparum metabolism, can be countered by a single amino acid mutation in a protein called cytochrome b.3 The very latest drug, artemisinin, is derived from the Chinese sweet wormwood plant.

    The Edge of Evolution

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