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Screening and bioassays for biologically-active substances from forty marine sponge species from San Diego, California, USA
The discussion relates the possession of biologically-active substances to the ecology of each sponge species; for example, sponges with antimicrobial substances are rarely overgrown. Expand
Localization of Two Brominated Metabolites, Aerothionin and Homoaerothionin, in Spherulous Cells of the Marine Sponge Aplysina fistularis (=Verongia thiona)
Energy dispersive X-ray microanalysis was used to localize the two brominated natural products in the tissues of a marine demosponge, Aplysina fistularis, for the first localization of any secondary metabolite at the cellular or sub-cellular level in any marine invertebrate. Expand
A chemical defense mechanism for the nudibranch cadlina luteomarginata
Abstract The nudibranch Cadlina luteomarginata from San Diego, California, concentrates selected metabolites from the sponges that constitute its diet. Gut analyses revealed that C. leutomarginataExpand
Environmentally induced variation in diterpene composition of the marine sponge Rhopaloeides odorabile
Field experiments in which fragments of one individual sponge were transplanted to different conditions of illumination and depth demonstrate that the chemical variability reflects the range of environmental conditions under which R. odorabile lives rather than any genetic differences. Expand
Fatty acids as biological markers for bacterial symbionts in sponges
Analyses of fatty acids with carbon numbers between C12 and C22 are reported for five Great Barrier Reef sponges. These analyses indicate that phototrophic cyanobacterial symbionts (blue-green algae)Expand
Terpenes in sponge cell membranes: Cell separation and membrane fractionation studies with the tropical marine spongeAmphimedon sp.
The differing sponge and symbiotic microbial cell types in the tropical marine spongeAmphimedon sp. were fractionated according to density, investigated by electron microscopy, and analyzed byExpand
Cell membrane localization of sterols with conventional and unusual side chains in two marine demonsponges
Subcellular fractionation by differential centrifugation was performed on two previously unstudied marine sponges that predominantly contain either conventional (Reniera sp.) or unconventional (Pseudaxinyssa sp.) sterols, and the presence of unconventional sterols in sponge membranes is shown not to be a universal feature of the Porifera. Expand
Biosynthetic studes of marine lipids 7
Abstract The biosynthesis of 24-isopropyl sterols comprising 99% of the sterols of the Great Barrier Reef sponge Pseudaxinyssa sp. was studied. The major biosynthetic pathway was established byExpand