Thursday, December 6, 2007

Science, November 23, 2007


Cover
Structure of the human β2-adrenergic receptor (red) embedded in a lipid membrane and bound to a diffusible ligand (green), with cholesterol (yellow) between the two receptor molecules. A cartoon of the lipidic cubic phase used for crystallization of the receptor is shown in the background.

Theory of Mind Is Independent of Episodic Memory
Contrary to current theory, two brain-injured patients who cannot remember their own past experiences can nevertheless infer the thoughts and beliefs of others.

Superconducting Pair Correlations in an Amorphous Insulating Nanohoneycomb Film
The magnetoresistance of thin bismuth films perforated with nanometer holes shows that the paired electrons that produce superconductivity can also induce an insulator state.

End-to-End Stacking and Liquid Crystal Condensation of 6- to 20-Base Pair DNA Duplexes
Known to form from long DNA segments, liquid crystalline phases can also be formed from short DNAs by stacking them into aggregates through adhesion of their end groups.

A High-Frequency Secondary Event During the 2004 Parkfield Earthquake
In the 2004, magnitude 6.0 Parkfield, California, earthquake the main rupture led 5 seconds later to increased slip from a secondary source 12 kilometers away.

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