Fatty-acid conjugation with cyclamate metabolites as a possible mechanism for ultimate retention.

In an in vitro rat-liver microsomal system fortified with coenzyme. A palmitic acid was found to conjugate at the nitrogen moiety of the cyclamate metabolite cyclohexylamine (CHA) and at both the nitrogen and oxygen moieties of its metabolite N-cyclohexylhydroxylamine (CHHA). The fatty acid was preferentially conjugated at or preferentially retained to the nitrogen moiety of CHHA. Stearic acid was also shown to conjugate with CHA. Amines may thus be another class of compounds that, like hydroxylated compounds, are retained in vivo as fatty-acid conjugates in lipid-containing tissues of animals.