Head-group deuterated 1,2-dimyristoyl-sn-glycero-3-phosphorylserine (DMPS) was synthesized. 2H NMR spectra reflect the ionic strength-dependent polymorphism of DMPS aqueous dispersions. Results obtained with pure DMPS and mixed bilayers with phosphatidylcholine or phosphatidylethanolamine at various NaCl or LiCl concentrations indicate that interactions with Na+ and Li+ have very different effects upon the head-group quadrupole splittings.
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Roux et al. (1986) studied this question.
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