Identification of ergosta-8,24(28)-dien-3 beta,6 alpha-diol in A delta 8 goes to delta 7 sterol isomerase-blocked yeast mutant.

In addition to the monohydroxysterols found in the delta 8 goes to delta 7 isomerase-blocked Saccharomyces cerevisiae mutant erg 2, a noval dihydroxysterol, ergosta-8,24(38)-dien-3 beta,6 alpha-diol, was isolated. This sterol accumulated to the extent of 2.1% of the total sterol fraction when this mutant was treated with 23-azacholesterol, a known inhibitor of the 24-methylene-sterol-24(28)-reductase.