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E-mails spark ethics row

Spat over health effects of atrazine escalates.

Breast cancer protein is finally purified

Isolation of BRCA2 could help understanding of cancer risk and aid drug screening.

Genetics: Pet project

Stymied in the search for genes underlying human neuropsychiatric diseases, some researchers are looking to dogs instead. David Cyranoski meets the geneticist's new best friend.

Drug flexes muscle against cancer

Decoy protein helps to fight cancer in mice by stopping muscle breakdown.

US court suspends research on human embryonic stem cells

Effects of injunction against Obama administration's stem-cell policy still unclear.

How an 1,800-year-old herbal mix heals the gut

An ancient Chinese medicine might ease side effects of cancer treatments.

Key Alzheimer's findings questioned

Conflicting results cloud link to prion protein.

Kids swap DNA for fairground rides

Researchers' efforts to collect samples at a fair raise ethical questions.

Biotechnology: Crossing the barrier

Researchers have rallied round a promising molecule for rescuing dying nerves. But getting it into the brain remains a daunting challenge, finds Brian Vastag.

Physiology: The bones of contention

The skeleton may provide more than just structural support. Alla Katsnelson investigates the rise of bone as a metabolic regulator.

Stem-cell work thrown into limbo

US district-court ruling suspends federal funding for research involving human embryonic stem cells.

The skin disease that cures itself

Diseased cells have harnessed a cancer-causing mechanism to banish a mutant gene.

High price to pay for misconduct investigations

A single investigation into research malpractice cost US$525,000.

Superfast TB test slashes waiting time

Infection with tuberculosis can be diagnosed easily and accurately in less than two hours.

FDA challenges stem-cell clinic

Injunction raises questions over regulation.