Contents
Vol 304, Issue 5678
Special Issue
Stardust at Comet Wild 2
Introduction to special issue
Perspectives
Research Articles
Reports
Special Feature
Special Feature
Special Feature
Contents
This Week in Science
Editorial
Editors' Choice
NetWatch
Products & Materials
News of the Week
ScienceScope
Random Samples
News Focus
Letters
Books
Policy Forum
Perspectives
Review
Brevia
- African Origins of the Domestic Donkey
Donkeys were domesticated twice, both times in northeastern Africa.
Research Article
- Matching Behavior and the Representation of Value in the Parietal Cortex
Certain brain neurons code for the comparative perceived value of paired alternatives between which monkeys choose when performing a task.
Reports
- Selective Growth of Metal Tips onto Semiconductor Quantum Rods and Tetrapods
Gold tips, grown selectively in a solution onto semiconducting nanorods, change the optical properties of the rods and can act as conducting contacts in a circuit.
- Ultrahigh-Resolution Spin-Echo Measurement of Surface Potential Energy Landscapes
The use of spin-polarized helium beams for imaging a surface by scattering improves the resolution of the image by three orders of magnitude.
- Hsp104 Catalyzes Formation and Elimination of Self-Replicating Sup35 Prion Conformers
A chaperone protein can either help to generate or to clear yeast prions, which behave similarly to the abnormally folded proteins that cause mad cow and related human diseases.
- Dynamics of Single mRNPs in Nuclei of Living Cells
After it is synthesized, messenger RNA moves through the nucleus by diffusion rather than by an energy dependent transport mechanism.
- Protein Kinase G from Pathogenic Mycobacteria Promotes Survival Within Macrophages
After infecting host cells, the mycobacterium responsible for tuberculosis secretes an enzyme that prevents its fusion with the host’s organelle that normally digests invaders.
- Salmonella Modulates Vesicular Traffic by Altering Phosphoinositide Metabolism
Salmonella, the bacterium that causes food poisoning, modifies host cell lipids immediately after invasion to establish a protected niche in which to replicate.
- Promotion of B Cell Immune Responses via an Alum-Induced Myeloid Cell Population
Before immune cells can make appropriate antibodies in the animal, they are primed by a type of spleen cell that secretes a cytokine.
- Control of Stochasticity in Eukaryotic Gene Expression
Gene expression shows varying amounts of random fluctuations because of different kinetic balances between promoter activation, deactivation, and transcription.
- Vesicular Glutamate Transporters 1 and 2 Target to Functionally Distinct Synaptic Release Sites
The two forms of the transporter that loads neurotransmitter into vesicles act in different areas of the adult brain but are both used within individual developing neurons at different synaptic release sites.
- Long-Term Memory Requires PolyADP-ribosylation
An enzyme important for gene transcription is required for several forms of long-term, but not short-term, memory in the invertebrate sea slug Aplysia.
- Involvement of Mammalian Mus81 in Genome Integrity and Tumor Suppression
A gene homologous to one that guides DNA replication and repair in yeast is a tumor suppressor in mice; when either or both copies are defective, lymphomas and other cancers develop.
Technical Comments
