Biosynthesis of β-sitosterol from [4-13C]mevalonic acid and sodium [1,2-13C]acetate in tissue cultures of Isodon japonicus hara
Abstract
The 13C-labelling patterns in β-sitosterol, isolated from Isodon japonicus Hara tissue cultures fed with [4-13C]mevalonic acid and [1,2-13C]acetate, provide confirmatory evidence for the postulated backbone rearrangement during biosynthesis of β-sitosterol, and also suggest that biological alkylation at C-24 is stereospecific.