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- W2068692753 abstract "Abstract A procedure was developed to label phospholipids in Drosophila heads by feeding radioactive phosphate ( 32 P i ). High‐performance thin‐layer chromatography showed label incorporation into various phospholipids. After 24 h of feeding, major phospholipids labeled were phosphatidylethanolamine (PE), 47%; phosphatidylcholine (PC), 24%; and phosphatidylinositol (PI), 12%. Drosophila heads have virtually no sphingomyelin as compared with mammalian tissues. Notable label was in ethanolamine plasmalogen, lysophosphatidylethanolamine, lysophosphatidylcholine and lysophosphatidylinositol. Less than 1% of the total label was in phosphatidylinositol 4‐phosphate and phosphatidylinositol 4,5‐bisphosphate. Other lipids labeled included phosphatidylserine, phosphatidic acid and some unidentified lipids. A time course (3–36 h) study revealed a gradual decrease in proportion of labeled PI, an increase in proportion of labeled PC and no obvious change in labeled PE. There were no significant differences in phospholipid labeling comparing the no r eceptor p otential ( norpA ) visual mutant and wild type under light vs. dark conditions. However, overall 32 P labeling was higher in the wild type fed in the light as compared to the dark and to norpA either in light or dark. This suggests that functional vision facilitates incorporation of label. Differences in phospholipid labeling were observed between young and aged flies, particularly in lysophospholipids and poly‐PI, implicating phospholipase A 2 function in recycling. Manipulations such as the o uter r habdomeres a bsent and ey es a bsent mutants and carotenoid deprivation failed to yield notable differences in phospholipid labeling pattern, suggesting that phospholipids important to vision may constitute only a minor portion of the total labeled pool in the head." @default.
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- W2068692753 date "1993-01-01" @default.
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- W2068692753 title "Phospholipids inDrosophila heads: Effects of visual mutants and phototransduction manipulations" @default.
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- W2068692753 doi "https://doi.org/10.1007/bf02536355" @default.
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