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13C NMR spectra of 1-stearoyl-2-linoleyl-sn-glycero-3-phosphorylcholine and 1-stearoyl-2-arachidonoyl-sn-glycero-3-phosphorylcholine in CDCl3 solution and in sonicated dispersions in 2H2O

✍ Scribed by Juan F. Santarén; M. Rico; J. Guilleme; A. Ribera

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
513 KB
Volume
18
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Two mixed‐acid lecithins: 1‐stearoyl‐2‐linoleyl‐sn‐glycero‐3‐phosphorylcholine (SLL) and 1‐stearoyl‐2‐arachidonoyl‐sn‐glycero‐3‐phosphorylcholine (SAL) have been synthesized by phospholipase A~2~ digestion of 1,2‐distearoyl‐sn‐glycero‐3‐phosphorylcholine (DSL), followed by reacylation of the lysolecithin with the desired fatty acid anhydride. ^13^C (25.2 MHz) NMR spectra of SLL and SAL in CDCl~3~ solution and in sonicated dispersions in ^2^H~2~O have been obtained. Complete spectral assignments are reported for the two molecules in both systems. ^13^C nuclear spin‐lattice relaxation times (T~1~) of SLL and SAL in sonicated aqueous dispersions have also been measured. Relaxation rate profiles as a function of the chain segment position are in general agreement with those recently obtained from ^2^H NMR for similar systems.

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