Membrane fractions display different lipid and enzyme content in three cell types in 16-cell stage embryos of sea urchins

Programmed reduction of ABC transporter activity in sea urchin germline progenitors

“…There is also selective accumulation of germline determinants, such as vasa (Voronina et al, 2008), only in the small micromeres. It is clear from our study and that of Sparling (Sparling and Kruszewska, 1990) that each of the two lineages produced by micromeres are endowed with different membrane proteins and lipids from the rest of the embryo. Asymmetric partitioning of developmental molecules, including ABC transporters, is likely to be essential for controlling cellular trajectory.…”

Analysis of Total Lipid Extracts from Human Liver by13C and1H Nuclear Magnetic Resonance Spectroscopy

“…2 Some authors have reported that linoleyl, 22:6(v-3) and 20:5(v-3) fatty acid chains can be de-comparison with literature data on 13 C NMR analysis of lipids (8, 9, 14-16, 18) as described in detail under tected in this spectral region (17). However, in the spectra described in the present paper the cluster of peaks Results and Discussion.…”

“…Similarly, a more complete and detailed 13 C NMR analysis of lipid extracts from viously described (6). The unsaturation ratio, the cholesterol to total lipids molar ratio, the PUFA/(PUFA / normal and pathologic human livers will contribute not only to a better understanding of the changes of lipid MUFA) ratio, the GPL/(GPL / TG) molar ratio, and the PC/PE molar ratio were calculated according to composition in the liver in pathological states, but also to direct future research programs on 13 C NMR spa-Sparling and Kruszewska (2). The values obtained for normal and pathologic livers are shown in Table 1.…”