Semipermeable Mixed Phospholipid-Fatty Acid Membranes Exhibit K+/Na+ Selectivity in the Absence of Proteins

Liver and intestinal fatty acid-binding proteins obtain fatty acids from phospholipid membranes by different mechanisms.

Intestinal enterocytes contain high concentrations of two cytosolic fatty acid-binding proteins (FABP), liver FABP (L-FABP) and intestinal FABP (I-FABP), which are hypothesized to play a role in cellular fatty acid trafficking. The mechanism(s) by which fatty acids move from membranes to each of these proteins is not known. Here we demonstrate that fluorescent anthroyloxy fatty acid analogues (...

on the status of mixed methods research in applied linguistics

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The Galactolipid, Phospholipid, and Fatty Acid Composition of the Chloroplast Envelope Membranes of Vicia faba. L.

The galactolipid, phospholipid, and fatty acid composition of chloroplast envelope membrane fractions isolated from leaves of Vicia faba L. has been determined. The major lipids in this fraction are: monogalactosyldiglyceride, 29%; digalactosyldiglyceride, 32%; phosphatidylcholine, 30%; and phosphatidylglycerol 9%. The lipid composition of the chloroplast envelope membranes is qualitatively sim...

Semipermeable lipid bilayers exhibit diastereoselectivity favoring ribose.

Nutrient uptake by a primitive cell would have been limited by the permeability characteristics of its membrane. We measured the permeabilities of model protocellular membranes to water, five of the six pentoses, and selected aldohexoses, ketohexoses, and three to six carbon alditols by following volume changes of vesicles after the addition of solute to the external medium. Solute hydrophobici...

Fatty acid and phospholipid metabolism in prokaryotes