I. Elenkov et al., STEROL COMPOSITION AND BIOSYNTHESIS IN THE BLACK-SEA SPONGE DYSIDEA-FRAGILIS, Comparative biochemistry and physiology. B. Comparative biochemistry, 107(4), 1994, pp. 547-551
The sterol composition of Dysidea fragilis from the Black Sea is repor
ted. Three groups of sterols, Delta(5), Delta(0) and Delta(5,7), were
found. The isolated 5 alpha,8 alpha- epidioxy sterols appeared to be p
redominantly, if not exclusively, artifacts. The auto-oxidation of nat
ive Delta(5,7)- sterols to 5 alpha,8 alpha- epidioxy sterols has been
investigated. A transformation of dietary Delta(5)- sterols to Delta(5
,7)- sterols has been demonstrated in Dysidea fragilis.