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Science

Reports continued

408 Physics: Creating Order from Random Fluctuations in Small Spin Ensembles

The cantilever tip in a magnetic resonance force microscope can be used to form, store, and retrieve information from small groups of spin-coordinated electrons in silicon.

411 Geophysics: Slip-Rate Measurements on the Karakorum Fault May Imply Secular Variations in Fault Motion

Offset glacial moraines imply that the fault bounding northern Tibet has moved recently, supporting the notion that collision of India with Asia is extruding Tibet to the west.

414 Evolution: Speciation by Distance in a Ring Species

Molecular variation in the greenish warbler of the Tibetan plateau shows that speciation has occurred despite gene flow through multiple connecting populations.

416 Geochemistry: Large Sulfur Bacteria and the Formation of Phosphorite

A huge marine bacterium can release enough phosphate to induce precipitation of phosphorite, possibly explaining large accumulations of this mineral in ocean sediments.

418 Medicine: Cardiovascular Risk Factors Emerge After Artificial Selection for Low Aerobic Capacity U. Wisleff et al.

Rats genetically selected for poor exercise endurance show signs of a metabolic syndrome, reinforcing a connection between cardiovascular health and aerobic capacity, related News story page 334; Type 2 Diabetes section page 369

421 Molecular Biology: Mechanism of hsp70i Gene Bookmarking

A gene needed for cells to survive stress is continually poised for activation;a binding protein recruits a second protein that keeps the chromatin open.

423 Developmental Biology: Mathematical Modeling of Planar Cell Polarity to Understand Domineering Nonautonomy

K.Amonlirdviman, N.A. Khare, D. R. P. Tree, W.-S. Chen,J. D.Axelrod, C.J. Tomlin

A mathematical model of the signaling cascade that controls cell polarity in the developing Drosophila wing describes the effects of known mutations and correctly predicts those of previously untested ones.

426 Medicine: Visfatin: A Protein Secreted by Visceral Fat That Mimics the Effects of Insulin

A. Fukuhara et al.

Excess abdominal fat increases the risk of metabolic disease, but unexpectedly produces a protein with some insulin-like beneficial properties. related Perspective page 366;Type 2 Diabetes section page 369

430 Immunology: T Helper Cell Fate Specified by Kinase-Mediated Interaction of T-bet with GATA-3

E. S. Hwang, S.J. Szabo, P. L. Schwartzberg, L. H. Glimcher

The transcription factor that triggers inflammation simultaneously inhibits other immune reactions by binding to and interfering with their activating transcription factors.

433 Biochemistry: Carotenoid Cation Formation and the Regulation of Photosynthetic Light Harvesting

N. E. Holt, D. Zigmantas, L. Valkunas, X.-P. Li, K. K. Niyogi, G. R. Fleming

During photosynthesis in bright light, excess energy is dissipated through the energy-requiring formation of a carotenoid with separated charges.

436 Microbiology: Cryo-Electron Tomography Reveals the Cytoskeletal Structure of Spiroplasma melliferum J. Kurner, A. S. Frangakis, W. Baumeister

A very small prokaryote contains three fibrous ribbons in its primitive cytoskeleton, whose coordinated changes may produce movement.

Haaas

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