[sahy-tuh-krohm] 
| any of several carrier molecules in the mitochondria of plant and animal cells, consisting of a protein and an iron-containing porphyrin ring and participating in the stepwise transfer of electrons in oxidation reactions: each cytochrome alternately accepts and releases an electron at a slightly lower energy level in the order designated b, c1, c, a, and a3. |
| cy·to·chrome (sī'tə-krōm') n. Any of a class of iron-containing proteins important in cell respiration as catalysts of oxidation-reduction reactions. |
cytochrome cy·to·chrome (sī'tə-krōm')
n.
Any of a class of iron-containing proteins important in cell respiration as catalysts of oxidation-reduction reactions.
təˌkroʊm
