title: Sulfoquinovosyl diacylglycerols from the alga Heterosigma carterae.
abstract: An extract of the chloromonad Heterosigma carterae (Raphidophyceae), cultivated in natural seawater, contained a complex mixture of sulfoquinovosyl diacylglycerols. Palmitoyl (16:0), three isomers of hexadecenoyl (16:1 cis delta 9, delta 11, delta 13), and eicosapentenoyl (20:5) were found to be the main fatty acyl substituents. Exact double-bond sites were determined by mass spectrometry analysis of the corresponding nicotinyl derivatives. Four major sulfoquinovosyl diacylglycerol components were partially purified and identified as 1-4 by interpretation of their nuclear magnetic resonance and mass spectral data. In addition, complete analysis of the H. carterae sulfoquinovosyl diacylglycerols was performed using high-performance liquid chromatography combined with electrospray tandem mass spectrometry.
authors.affiliation: Institute for Marine Biosciences, National Research Council of Canada, Halifax, Nova Scotia, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Keusgen
authors.forename: J M
authors.initials: JM
authors.lastname: Curtis
authors.forename: P
authors.initials: P
authors.lastname: Thibault
authors.forename: J A
authors.initials: JA
authors.lastname: Walter
authors.forename: A
authors.initials: A
authors.lastname: Windust
authors.forename: S W
authors.initials: SW
authors.lastname: Ayer
mesh_terms: D004075:Diglycerides / Q000032:analysis* / Q000737:chemistry; D056890:Eukaryota / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry / Q000379:methods; D015394:Molecular Structure
chemical_list: D004075:Diglycerides