Concentration (pg/mg) of cholesterol metabolites in various tissues after incubation with normal cholesterol (C) and labeled Cholesterol-[4-¹³C] (C-[4-¹³C]).

Retention time (Rt), foregut (FG), midgut (MG) and hindgut (HG). ○ Identified by comparison with authentic samples. ◊ Identification by search in the spectra database and through derivatization. ✘ denotes not detected. Concentration (pg/mg) of cholesterol metabolites in various tissues after incubation with normal cholesterol (C) and labeled Cholesterol-[4-13C] (C-[4-13C]).