An oxidizing enzyme containing iron and a porphyrin, found in mitochondria and important in cell respiration as an agent of electron transfer from certain cytochrome molecules to oxygen molecules.细胞色素氧化酶：含有铁和紫质的氧化酶，存在于线粒体中，在细胞呼吸中作为电子剂，在把某些胞色细胞分子转变成氧分子过程中起重要作用