https://doi.org/10.1351/goldbook.15623
Obsolete term for cytochrome P450 I, A1, and A2, one of the major families of the cytochromes P450 hemoproteins.
Note: During the monooxygenation of certain substances, often a detoxification process, these iso-enzymes may produce intermediates which can initiate mutations, cancer, immunotoxic reactions, and adverse effects.