Normal vibrational modes of phospholipid bilayers observed by low-frequency Raman scattering

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

8 Цитирования (Scopus)

Аннотация

Low-frequency Raman spectra of multilamellar vesicles made either of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) or 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) have been studied in a wide temperature range. Below 0C two peaks are found at frequencies around 8-9 and 14-17cm-1 and attributed to the normal vibrational modes of the phospholipid bilayer, which are determined by the bilayer thickness and stiffness (elastic modulus). The spectral positions of the peaks depend on the temperature and the bilayer composition. It is suggested that the ratio of the intensities of the first and second peaks can serve as a measure of the interleaflet elastic coupling. The addition of cholesterol to the phospholipid bilayer leads to peak shift and broadening, which may be assigned to the composition heterogeneities commonly attributed to the lipid raft formation.

Язык оригиналаанглийский
Номер статьи032412
Число страниц5
ЖурналPhysical Review E
Том95
Номер выпуска3
DOI
СостояниеОпубликовано - 20 мар 2017

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