Jan 2, 1976

Incorporation of (1-14C)palmitoyl-CoA into phosphatidylcholine by plasma membranes of rat submaxillary glands in vitro

European Journal of Biochemistry
M S Nijjar, E T Pritchard


1. On incubation with the isolated rat submaxillary gland plasma membranes, [1-14C]palmitoyl-CoA was incorporated mainly into phosphatidylcholine and hydrolysed to [1-14C]palmitic acid and CoASH. 2. The addition of lysophosphatidylcholine enhanced the incorporation into phosphatidylcholine and lowered the hydrolysis of palmitoyl-CoA markedly. 3. In the presence of lysophosphatidylcholine, palmitoyl-CoA incorporation into phosphatidylcholine was maximum at 0.1 mM palmitoyl-CoA, 0.5 mM lysophosphatidylcholine and between pH 7.0 and 9.0. 4. The incorporation into phosphatidylcholine was stimulated by Na+, K+ and K-, inhibited by Ca2+ and Mg2+ and unaffected by sodium deoxycholate and ATP. 5. Epinephrine inhibited the incorporation of palmitoyl-CoA into phosphatidylcholine in the presence or absence of ATP, the inhibition being more in the presence of ATP than in its absence. Dibutyryl adenosine 3':5'-monophosphate mimicked the inhibitory effect of epinephrine.

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Mentioned in this Paper

Deoxycholic Acid, Sodium Salt, 12beta-Isomer
Palmitic Acids
Submandibular Gland

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