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Proposed sterol biosynthesis pathway from cycloartenol to ergosterol and 7-dehydroporiferasterol in C. reinhardtii; inhibition of sterol C24-methyltransferase action from incubation with 25-thialanosterol salt is shown. In brackets is shown lanosterol, which was not detected in cells but is presumed to be an intermediate to cholesta-7,24-dienol. Systematic naming of sterols are reported in Tables 1 and 2.
