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Saccharomyces cerevisiae strain GL7 defective in ergosterol biosynthesis incubated with nutritional sterols supplements as described in Materials and Methods; ergosterol (black circle), 6-methyl sterol aromatics from A. castellanii (orange circle) or no sterol (blue circle). Note, 7-dehydroporiferasterol, brassicasterol and poriferasterol supplements supported growth in similar fashion to ergosterol-grown cells.
