Der Cholinfaktor von Eigelb und die Phosphatid-Lecithinzahl des Eierlecithins

Nottbohm, F. E.; Mayer, F.

doi:10.1007/bf01667101

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…unincubated egg (Table I) is somewhat higher than that given by Rhodes and Lea (14) but agrees more closely with the values given by Nottbohm and nlayer (24) and Katrcher et al (25). Although we were able to detect only a trace (i.e.…”

Section: Resultssupporting

confidence: 91%

Metabolism of the Yolk Phospholipids by the Developing Chick Embryo

Noble¹,

Moore²

1965

Can. J. Biochem.

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A study was made of the concentrations and fatty acid compositioias of the various phospholipids in the yolks of fertile unincubated eggs and in the yolks sf eggs that had been incubated for 113,15,17,19, and 21 days. Phosphatidyl choline and phssphatidyl ethanolamine accounted for 69 and 24y0 respectively of the total phospholipids present in the yolk s f the unincubated egg. The remaining 7% was accounted for by small amounts of phosphatidyl serrne, s hingomyelin, and a phospholipid fraction that was tentatively identified as dipRosphatidy l glycerol. Although the percentage of total phospholipids in the total yolk li id did not vary during incubation, there was a pronounced increase in the phosp~atidyl choline : phosphatidyl ethanehrnine ratio as incubation proceeded. The phosphatidyl ethanolamine fraction was the only phospholipid fraction present in the yolk that showed any consistent change in fatty aeid composition during incubation. The concentratisn of docasahexaenoic acid in the fatty acids of the yolk phosphatidyl ethanolamine decreased from 8% on day 0 to l.6Y0 on day 21. I t is suggested that the developin embryo preferentially absorbs from the yolk a phosphatidyl ethanolarnine fraction that is relatively rich in docosahexaenoic acid.

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Section: Resultssupporting

confidence: 91%

Metabolism of the Yolk Phospholipids by the Developing Chick Embryo

Noble¹,

Moore²

1965

Can. J. Biochem.

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“…Despite the long-established use of egg yolk as a convenient source of phospholipids, data available in the literature on the composition of this important fraction of the yolk (over 20 % of the total solids) are incomplete and contradictory. Wittcoff (1951), in his recent monograph, was able to quote only three analyses, the earliest of which (30 % lecithin, 70 % kephalin) is clearly in conflict with the later data of Nottbohm & Mayer (1933) (72 % lecithin, 28 % kephalin) and of Kaucher, Galbraith, Button & Williams (1943) (72 % lecithin, 25 % kephalin, 2X5% sphingomyelin).…”

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confidence: 99%

Phospholipids. 4. On the composition of hen's egg phospholipids

Rhodes

Lea

1957

Biochemical Journal

278

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1. Free glutamic acid accumulates within Staphylococcu8 aurev, incubated in the presence of N-phosphoryl-L-glutamic acid or diethyl glutamate.2. Free glutamic acid does not accumulate within cells incubated with peptides containing glutamic acid residues unless glucose is also present. The rate of accumulation is higher when incubation takes place with a-glutamyl peptides than with y-glutamyl peptides and is affected by the rate of hydrolysis of the peptide within the cell and also by the partition coefficient of the peptide between n-butanol and water.3. When Staphylococcus aureu8 is incubated with glucose and dior tri-peptides containing aglutamyl residues, the rate of accumulation of free glutamic acid within the cells can be correlated with the produot of the rate of hydrolysis and the partition coefficient between butanol and water.4. Accumulation of free glutamic acid in all cases studied is inhibited by sodium azide and 2:4dinitrophenol.

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Quantitative Bestimmung von Lecithin und Colaminkephalin in pharmazeutischen Präparaten mit Hilfe der Dünnschicht‐Chromatographie

Wagner¹

1961

Fette, Seifen, Anstrichm.

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Nach einer Übersicht über die bisher verwendeten Methoden zur Bestimmung von Rein‐Lecithin und Rein‐Colaminkephalin in verschiedenen Phosphatid‐Extrakten des Handels wird über ein einfaches und exaktes Verfahren berichtet, dem die Dünnschicht‐Chromatogrpahie auf Kieselgel G zugrunde liegt. Die Bestimmung des Lecithins und Colaminkephalins wurde in Phosphatid‐Extrakten aus Soja, Eigelb, Herzmuskel und Gehirn durchgeführt.

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Der Cholinfaktor von Eigelb und die Phosphatid-Lecithinzahl des Eierlecithins

Cited by 9 publications

References 4 publications

Metabolism of the Yolk Phospholipids by the Developing Chick Embryo

Metabolism of the Yolk Phospholipids by the Developing Chick Embryo

Phospholipids. 4. On the composition of hen's egg phospholipids

Quantitative Bestimmung von Lecithin und Colaminkephalin in pharmazeutischen Präparaten mit Hilfe der Dünnschicht‐Chromatographie

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