“…Yeasts of the genus Saccharomyces are particularly rich in sterols (69). Ergosterol has been identified as the major sterol in S. cerevisiae (6,25,76,101), Kluyvero-myces fragilis (234), and C. albicans (43), and can account for over 90% of the total sterol. Strain differences can, however, exist as shown by the major occurrence of ergosta-5,7,22,24(28)-tetraen-3f3-ol in S. cerevisiae N.C.Y.C.…”