Ev. Levina et al., OPHIUROID-TYPE STEROIDS IN STARFISH OF THE GENUS PTERASTER, Comparative biochemistry and physiology. B. Comparative biochemistry, 114(1), 1996, pp. 49-52
Composition of steroid sulfates from starfish Pteraster tessellatus an
d Pteraster spl is reported. 2,21-Disulfate of cholest-5-ene-2 beta,3
alpha,21 triol 1) and 3,21-disulfates of cholest-5-ene-2 beta,3 alpha,
21-triol 2) and cholest-5-ene-3 alpha,4 beta,21-triol 3) were found in
both species. These steroids are characteristic secondary metabolites
of ophiuroids and have not been isolated previously from Asteroidea (
starfish) or other taxa. Phylogenetic relationships between classes As
teroidea and Ophiuroids are discussed.