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The biologically active ganglioside molecular species, LG-2, which has been obtained from the starfish Astropecten latespinosus, was completely methylated followed by separation using reversed phase HPLC to give a methylated major component, LG-2M-5, in the pure state. The ceramide moiety of LG-2M-5 was indicated by the positive ion fast atom bombardment tandem mass spectrometry (FABMS/MS) of LG-2M-5...
Lipoxin A 4 (LXA 4 ) is a biologically active compound produced from arachidonic acid via interactions of lipoxygenases. Incubation of LXA 4 either with human neutrophils or with the neutrophil microsomes leads to formation of a polar compound on a reverse-phase high-performance liquid chromatography. We have identified the metabolite as 20-hydroxy-LXA 4 , a novel metabolite...
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