This isozyme seems to be implicated in olfaction. Active in the demethylation of erythromycin as well as benzphetamine. an organic molecule + O2 + reduced [NADPH--hemoprotein reductase] = an alcohol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Mainly expressed in olfactory epithelium. Belongs to the cytochrome P450 family.