✦ LIBER ✦

Analysis of dimeric species derived from the reaction of phosphatidylethanolamine with dimethylsuberimidate

✍ Scribed by Mary R. Roth; Fred L. Smardo Jr.; Ruth Welti

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 722 KB
Volume: 51
Category: Article
ISSN: 0009-3084
DOI: 10.1016/0009-3084(89)90064-9

No coin nor oath required. For personal study only.

✦ Synopsis

Phosphatidylethanolamines of various fatty acyl species in vortexed lipid dispersions were reacted with dimetbylsuberimidate to produce dimeric products. The yield was 34% at pH 10 and 2% at pH 7. The crosslinked phosphatidylethanolamine species were separated from minor products and the reactants by extraction and two-dimensional thin-layer chromatography on silica gel G, gel filtration on lipophilic Sephadex, or C~,-reversed phase high-performance liquid chromatography (HPLC). Reversed phase HPLC was also used to resolve the dimers into individual molecular species. Analysis of the dimers revealed the extinction coefficients at 205 nm to be higher than those of the reactant pbosphatidylethanolamines. Proton nuclear magnetic resonance spectroscopy and chemical analysis implied that the dimers contain an amidine group.

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