Lipid exchange between membranes

Lipid Membranes

Exchange of phospholipids between brain membranes in vitro.

1. When unlabelled mitochondria from guinea-pig brain were incubated with a (32)P-labelled microsomal fraction from brain there was a transfer of phospholipid to the mitochondria, which could not be accounted for by an aggregation of microsomes and mitochondria or an exchange with microsomes contaminating the mitochondria. Under similar circumstances there was a transfer of phospholipid from (3...

Long-Range Interaction Forces between Polymer-Supported Lipid Bilayer Membranes.

Much of the short-range forces and structures of softly supported DMPC bilayers has been described previously. However, one interesting feature of the measured force-distance profile that remained unexplained is the presence of a long-range exponentially decaying repulsive force that is not observed between rigidly supported bilayers on solid mica substrate surfaces. This observation is discuss...

Fluorescence probe partitioning between Lo/Ld phases in lipid membranes.

Fluorescence microscopy imaging is an important technique for studying lipid membranes and is increasingly being used for examining lipid bilayer membranes, especially those showing macroscopic coexisting domains. Lipid phase coexistence is a phenomenon of potential biological significance. The identification of lipid membrane heterogeneity by fluorescence microscopy relies on membrane markers ...

Dialogue between membranes and their lipid-metabolizing enzymes.

Biological chemists have often regarded the fluidity or plasticity of a membrane as a property that may be adaptively altered to accommodate changes in environmental temperature. The implication that cells exhibit an intelligent (or at least, appropriate) response provides us with several questions to examine. (1) Is temperature or some aspect of fluidity perceived by the responsive cellular el...