Advertisement

News & Opinion

Covering the life sciences inside and out

Most Recent

Red squirrels in Britain

By | September 25, 2001

Red squirrels (Sciurus vulgaris) thrive in the north of England and Scotland and occupy a patchwork of highly fragmented woodland habitats. In the September 21 Science, Marie Hale and colleagues from the University of Newcastle, UK, report a genetic investigation of the impact of habitat fragmentation on British red squirrel populations (Science 2001, 293:2246-2248).They assembled over 100 squirrel samples collected between 1918 and 2000 and analysed four polymorphic microsatellite loci for each

0 Comments

US agreement clarifies the use of stem cells in research

By | September 25, 2001

Agreement enables basic stem cell research to continue but bans diagnostic or therapeutic applications.

0 Comments

Cod origins

By | September 24, 2001

Identifying the population origins of individual fish is important in assisting the policing of fishing waters and the tracking down of poachers. In the September 20 Nature, Einar Nielsen and colleagues from the Danish Institute for Fisheries Research describe a simple approach using microsatellite markers to assign individual Atlantic cod fish (Gadas morhua) to their original population (Nature 2001, 413:272).They studied three cod populations; from the North Sea, the Baltic Sea, and the northe

0 Comments

Long term memory signals

By | September 24, 2001

The neural activity signaled by calcium/calmodulin-dependent protein kinase IV plays an important role in maintaining long-term memories.

0 Comments

New pathway to understanding circadian rhythms

By | September 24, 2001

The mechanism that keeps track of time in our body is based on a perpetual secretion of clock proteins in a 24-hour feedback loop. But the signaling molecules that control this clock are largely unknown. In September 21 Science Julie Williams and colleagues from Howard Hughes Medical Institute, show that that the protein produced by Drosophila version of the neurofibromatosis-1 (Nf1) gene controls the circadian machinery via the Ras/MAPK signaling pathway.Williams et al. studied Drosophila with

0 Comments

Novel protein controlling bacterial tryptophan production

By | September 21, 2001

Many bacterial species recognize the amino acid tryptophan and its transfer RNA as a regulatory signal responsible for tryptophan biosynthesis. In September 14 Science, Angela Valbuzzi and Charles Yanofsky from the Department of Biological Sciences, Stanford University determined that, in addition to sensing the amount of tryptophan present, Bacillus subtilis also has a mechanism for detecting the concentration of tryptophan-specific tRNA.Valbuzzi & Yanofsky discovered that if the amount of

0 Comments

Of hippopotami and whales

By | September 21, 2001

New Eocene fossils discovered in Pakistan suggest that whales evolved from hippopotamuses.

0 Comments

Staphylococcus

By | September 21, 2001

Although many gene-inactivation technologies have been applied to bacterial genetics, the potential for using antisense technology has not been extensively explored. In the September 21 Science, Yindo Ji and colleagues from GlaxoSmithKline Pharmaceuticals in Collegeville, Pennsylvania, describe a comprehensive genomic analysis of the human pathogen Staphylococcus aureus using a regulated antisense strategy (Science 2001, 293:2266-2269).They used an adapted tetracycline-dependent (tet) regulatory

0 Comments

Tumor-growing role for endothelial growth factor

By | September 21, 2001

Malignant cells secrete vascular endothelial growth factor (VEGF) that then binds to specific receptors on endothelial cells to induce tumor angiogenesis. In September 15 Blood, Rizwan Masood and colleagues from Keck School of Medicine of the University of Southern California show that VEGF has an additional role in tumor development because it is also a direct growth factor for many tumor cells.Working on tumor cell lines in vitro, Masood et al. found that several tumor types (Kaposi's sarcomas

0 Comments

Agrin therapy

By | September 20, 2001

Gene therapy with a mini-agrin transgene rescues muscular dystrophy in mice lacking a functional lama2 gene.

0 Comments

Advertisement

Popular Now

  1. Opinion: Too Many Mitochondrial Genome Papers
  2. Neanderthal-Human Hybrid Unearthed
  3. Sex Differences in Pain Pathway
  4. Antibiotics and the Gut Microbiome
Advertisement
BioLegend
BioLegend
Advertisement
The Scientist