共查询到20条相似文献,搜索用时 15 毫秒
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X. He K. Kustin D. L. Parry W. E. Robinson G. Ruberto K. Nakanishi 《Cellular and molecular life sciences : CMLS》1992,48(4):367-371
Ascidia ceratodes exposed to14C-phenylalanine in the surrounding seawater incorporates the radiolabel into newly biosynthesized tunichrome molecules. Radioactivity can be detected in tunichrome extracted from circulating blood cells within one day following initial exposure to the radiolabel; weak activity (4 Ci/mol tunichrome=22 nmol phenylalanine/mol tunichrome) is detected in 1 to 10 days; significantly higher amounts of radiolabel (57 Ci/mol tunichrome=318 nmol phenylalanine/mol tunichrome) appear 20 days after seawater exposure. Therefore, phenylalanine can function as a precursor in the biosynthesis of tunichrome. 相似文献
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Ascidia ceratodes exposed to 14C-phenylalanine in the surrounding seawater incorporates the radiolabel into newly biosynthesized tunichrome molecules. Radioactivity can be detected in tunichrome extracted from circulating blood cells within one day following initial exposure to the radiolabel; weak activity (less than or equal to 4 microCi/mol tunichrome = 22 nmol phenylalanine/mol tunichrome) is detected in 1 to 10 days; significantly higher amounts of radiolabel (57 microCi/mol tunichrome = 318 nmol phenylalanine/mol tunichrome) appear 20 days after seawater exposure. Therefore, phenylalanine can function as a precursor in the biosynthesis of tunichrome. 相似文献
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Résumé L'administration d'aflatoxine B1 (2 et 5 mg/kg, i.p., 24 h avant le sacrifice) a résulté en un abaissement de 80% de l'incorporation du l-14C-acétate en cholestérol par des coupes de tissu de foie. Le même traitement n'a pas altéré l'activité des drug metabolizing enzymes au niveau des microsomes du foie. 相似文献
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Résumé Le taux d'incorporation de l'acide palmitique marqué à l'hydrogène 3 dans les cellules des bronchioles terminales et des alvéoles du poumon de la souris, suggère que le surfactan pulmonaire est sécrété par les cellules deClara dans les bronchioles terminales. 相似文献
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Early incorporation of labelled palmitate into mouse lung 总被引:1,自引:0,他引:1
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S. Naqvi K. S. Kumar T. A. Venkitasubramanian 《Cellular and molecular life sciences : CMLS》1968,24(9):891-892
Zusammenfassung Einfluss von Bestrahlung auf die Lipidsynthese, wobei festgestellt wird, dass der Strahlungsschutzstoff AET die Lipidsynthese hemmt. 相似文献
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Riassunto È stata studiata l'incorporazione dell'acetato-1-14C nei fosfolipidi, nel colesterolo e negli acidi grassi di sezioni di fegato normale e vacuolizzato di ratto. Essa non è variata, in nessuna delle frazioni lipidiche considerate, nelle sezioni di fegato colpito da degenerazione vacuolare. Si discutono i risultati in rapporto alle precedenti osservazioni sulla inibizione dell'incorporazione degli amino acidi marcati nelle proteine delle sezioni di fegato vacuolizzato. 相似文献
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Zusammenfassung Männliche Albino-Ratten, 45 Tage bei riboflavinarmer Nahrung, zeigten erhöhten Gehalt freien Aminosäure-Stickstoffs in Leber, Muskel und Plasma. Die Erhöhung scheint durch eine gesteigerte Aktivität der Nebennierenrinde beim Riboflavinmangel herbeigeführt zu sein. 相似文献
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R. J. Morin 《Cellular and molecular life sciences : CMLS》1970,26(11):1214-1215
Zusammenfassung Der Grad des Einbaus von14C-markierten Prekursoren in die Arterienphospholipide des Schweins war folgender: Cholin>Aethanolin>Serin> Glycerin>Format>Azetat. Bei Bebrütung von Arterien mit14C-Cholin oder14C-Aethanolamin trat ein deutlich erhöhter Einbau von14C in das Phosphatidylcholin auf.
This investigation was supported by Grant No. 5R01-HE10172-03 from the National Heart Institute, U.S.P.H.S. 相似文献
This investigation was supported by Grant No. 5R01-HE10172-03 from the National Heart Institute, U.S.P.H.S. 相似文献
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A. H. Jackson W. Lertwanawatana G. Procter S. G. Smith 《Cellular and molecular life sciences : CMLS》1987,43(8):892-894
Summary 11-(R)-2H porphobilinogen, stereospecifically labelled with deuterium in the aminomethylene group has been incorporated into protoporphyrin-IX by haemolysates of chicken erythrocytes. High field NMR spectroscopy confirms that the overall biochemical process is stereospecific, deuterium being retained at the -, -and -meso positions and lost from the -meso position.27 August 1986 相似文献
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11-(R)-2H porphobilinogen, stereospecifically labelled with deuterium in the aminomethylene group has been incorporated into protoporphyrin-IX by haemolysates of chicken erythrocytes. High field NMR spectroscopy confirms that the overall biochemical process is stereospecific, deuterium being retained at the alpha-, gamma- and delta-meso positions and lost from the beta-meso position. 相似文献
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E. W. Haeffner 《Cellular and molecular life sciences : CMLS》1974,30(10):1111-1113
Zusammenfassung Es wird über den diurnalen Rhythmus des Cholin-Einbaues sowie des Gesamt-Lecithin-Gehaltes des glykogenfreien Ehrlich-Lettré Mäuse-Ascites-Tumors berichtet. 24stündige Hungerbehandlung der Mäuse löscht diesen Effekt, während cholinfreie Diät keinen Einfluss auf den rhythmischen Verlauf hat. Thymidin-Einbau in DNA und Mitoserate zeigen keinen diurnalen Rhythmus.
Acknowledgments. The author wishes to thank Dr.C. Granzow from this institute for providing the data on the mitotic index. The excellent technical assistance ofO. Gilch is greatly appreciated. 相似文献
Acknowledgments. The author wishes to thank Dr.C. Granzow from this institute for providing the data on the mitotic index. The excellent technical assistance ofO. Gilch is greatly appreciated. 相似文献
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