“…The acidic fraction obtained by extracting the lipids recovered from the lumen contents with sodium bicarbonate shows that a more extensive degradation of the molecule has taken place. Part of this material probably arises from ergosterol, absorbed, metabolized in the liver and excreted as a bile acid in a similar manner to the metabolism of ergosterol (Hanahan & Al-Wakil, 1953) and cholesterol (Bloch, Berg & Rittenberg, 1943;Bergstrom, 1953;, and the remainder by metabolism in the lumen of the intestine (Edwards & Cook, 1955).…”