F-ara-Edu is injected into zebrafish eggs. Interactions of biological macromolecules are the central bases of living systems. Biological macromolecules are synthesized in living cells by linking many small molecules together. Naturally occurring macromolecules include genetic materials (DNA) and proteins. A detailed understanding of the synthesis of these macromolecules in whole animals is a basic requirement for understanding biological systems, and for the development of new therapeutic strategies.

Plants must supply their various tissues with the carbohydrates they produce through photosynthesis in the leaves. However, they do not have a muscular pump like the human heart to help transport this vital fuel. Instead, they use pump proteins in their cell membranes for this purpose. Together with colleagues from the Carnegie Institution for Science in California, Alisdair Fernie from the Max Planck Institute of Molecular Plant Physiology in Potsdam has identified a hitherto unknown protein in the carbohydrate transport chain. The researchers' discovery could help to protect plants against pests and increase harvest yields.

Jackson is the male southern elephant seal tracked by the Wildlife Conservation Society that traveled an astonishing 18,000 miles The Wildlife Conservation Society tracked a southern elephant seal for an astonishing 18,000 miles – the equivalent of New York to Sydney and back again.

Individuals suffering from mood and anxiety disorders such as bipolar, panic disorder and major depressive disorder may be more likely to abuse opioids, according to a new study led by researchers from the Johns Hopkins Bloomberg School of Public Health. They found that mood and anxiety disorders are highly associated with non-medical prescription opioid use. The results are featured in a recent issue of the Journal of Psychological Medicine.