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Ether lipids from Botryococcus braunii and their biosynthesis

, : Ether lipids from Botryococcus braunii and their biosynthesis. Phytochemistry 31(7): 2341-2349

Six new series of ether lipids, named botryococcoid ethers, have been isolated from the green microalga Botryococcus braunii (A race). These high molecular weight lipids are structurally related to compounds previously identified in this alga, such as n-alkadienes, very long chain alkenylphenols and botryals (C52-C64 alpha-branched, alpha-unsaturated aldehydes). The structures were determined by a combination of methods including NMR, mass spectrometry and size exclusion HPLC, as di-O-alkenyl ethers, alkenyl-O-alkylphenol ethers, alkenyl-O-Botryalyl ethers and alkenyl-O-epoxybotryalyl ethers. All these compounds possess two very long chains ether-linked at C-9' and C-10, one hydroxyl at C-10' and a second hydroxyl, or an ester group, at C-9. The presence of oxygen functions at C-9, C-10, C-9' one C-10' in the two hydrocarbon branches suggested that they could be biosynthesized by coupling of two epoxides, normally synthesized by the alga, and derived from the parent compounds. On the basis of data from feeding experiments with 14C-labelled cis-9,10-epoxynonacos-28-ene which show the incorporation of radioactivity into the ether lipids without prior degradation into acetate units, a biosynthetic mechanism is proposed, with epoxides as close precursors.

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Accession: 002373642

DOI: 10.1016/0031-9422(92)83277-6

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Ostry, M.E.; Ellingson, B.; Seekins, D.; Ruckheim, W., 2003: The need for silvicultural practices and collection of butternut germplasm for species conservation. Butternut (Juglans cinerea) is a short-lived tree and is declining in numbers for a variety of reasons ranging from changing land use to aging forest stands, seed predation and lack of suitable conditions for reproduction. However, the major reaso...

Russell Alison, 1989: Pyrites as a sulfur source; down but not out. Industrial Minerals (London) 261: 41

Rahbar K.; Chopra R.N., 1982: Factors affecting bud induction in the moss hyophila involuta. Protonema of H. involuta remains bud-free on basal medium (Knop's Major and Nitsch's Minor salts). Auxins, GA3, abscisic acid, chelates, vitamin B12, activated charcoal, coconut milk and altered hydration, pH, temperature, light intensit...

Eshel Y.; Kovacs M.; Rubin B., 1975: Differential tolerance of peas to prometryne and terbutryne. Pesticide Biochemistry & Physiology 5(3): 295-302

Lantos, J.; Temes, G.; Roth, E.; Morvay, G., 1993: The effect of glucose and lactic acidosis on brain lipid peroxidation during ischemia and reperfusion. Mozsik, G [Editor], Emerit, I [Editor], Feher, J [Editor], Matkovics, B [Editor], Vincze, A [Editor] Oxygen free radicals and scavengers in the natural sciences : 147-150

Ballanger, R.; Ballanger, P., 1980: Treatment of prostatic cancer with radiotherapy. Acta Urologica Belgica 48(1): 86-91

Haldeman D.C., 1991: Sexual orientation conversion therapy for gay men and lesbians a scientific examination. Gonsiorek, J C And J D Weinrich (Ed ) Homosexuality: Research Implications For Public Policy Xv+295p Sage Publications, Inc : Newbury Park, California, Usa; London, England, Uk Illus 149-160

Khadra, A.; Oakeshott, P., 2002: Pilot study of testicular cancer awareness and testicular self-examination in men attending two South London general practices. Testicular cancer (TC) awareness and testicular self-examination (TSE) have never been evaluated adequately in UK general practice. TC has a 96% cure rate if detected early. Our aim was to estimate awareness of TC and practice of TSE in a general...

Kanaizumi T., 1984: Studies on the gastric emptying related with the types of stomach forms in healthy subjects. Gastric emptying curves were studied on normal stomach using liquid food labeled 99mTc-DTPA [diethylenetriaminepentaacetic acid] in supine position. Three patterns of gastric emptying curves were observed for whole stomach, fundic-body and antral...

Mulholland P.J.; Yarbro L.A.; Sniffen R.P.; Kuenzler E.J., 1981: Effects of floods on nutrient and metal concentrations in a coastal plain stream. Water quality in Creeping Swamp, a coastal plain stream in North Carolina [USA], was monitored during 2 floods in 1976. The concentrations of most of the filterable substances studied remained relatively constant, particularly at the upstream stat...