Biosynthesis of phytosterols in Calendula officinalis flowers from (2R)- and (2RS)-[2-14C, 2-3H]-mevalonic acid. The incorporation of a 15α-tritium atom into sitosterol
Abstract
It is proven that only the 2-pro-R hydrogen of MVA is retained at the 15α-position of sitosterol biosynthesized by excised petals of Calendula officinalis flowers.