Diallyl sulfone (DASO2) is a garlic derivative formed during cooking or after ingestion. Bioactivation of DASO2 in murine lung and liver results in formation of an epoxide that inactivates CYP2E1 and significantly decreases cytochrome P450 and heme levels. In this study, we tested the hypothesis that DASO2 metabolism leads to production of the heme adduct, N-alkylprotoporphyrin IX (N-alkylPP). ...