Studies on Phospholipids of Meats

Physical Studies of Phospholipids

On heating pure, fully saturated 2,3-diacyl-DL-phosphatidyl-ethanolamines and 2,3-diacylphosphatidyl-cholines (lecithins) in water to the transition temperature at which large endothermic heat changes occur, they are observed, by light microscopy, to form myelin figures. This result is discussed in terms of the large difference in the transition temperature for "melting" of the hydrocarbon chai...

Studies on the role of phospholipids in phagocytosis.

70 Studies on Phospholipids 3 . DETERMINATION OF CHOLINE

Micromethods for the determination of choline have been described by Beattie (1936) and Glick (1944). Both procedures involved the use of Reinecke salt as a precipitant, required 20150 pmoles of choline and depended on measurement of the pink colour of an acetone solution of the precipitate. More sensitive modifications of the reineckate method depend upon measurement of the chromium content of...

Studies on Phospholipids. 9. the Composition of Rat-liver Lecithins.

Studies on microsomal phospholipids that inhibit gulonolactone oxidase.

Fractions of rat liver microsomal phospholipid that inhibit gulonolactone oxidase are described. The inhibition was shown to be complete and occurs rapidly after the reaction has proceeded at the control rate for 20 to 30 min. It could be totally reversed by the addition of tocopherol, Mn++, Co++, or ethylenediaminetetraacetate. The inhibitory activity of the phospholipid was lost by enzymic cl...