Images Dated 28th September 2004

DNA molecule

DNA molecule. Computer artwork of a molecule of DNA (deoxyribonucleic acid) with the chemical formulas of its components. DNA is composed of two sugar-phosphate backbones (blue) and nucleotide bases (red, yellow, green and purple). There are four different bases: guanine, cytosine, thymine and adenine. DNA contains sections called genes, which encode the body's genetic information

© PASIEKA/SCIENCE PHOTO LIBRARY

USA, Alaska, Denali National Park, Mt

USA, Alaska, Denali National Park, Mt. McKinley, Highest Peak in North America
USA-ALASKA-INTERIOR-DENALI NATIONAL PARK:
Mt. McKinley (Denali)- Highest Peak in North America (elev. 20, 320 Ft) - Aerial View / Winter
'© Walter Bibikow 2004

© Walter Bibikow

Alaska, America, American, Denali, Denali National Park, Highest Peak In North America, Jai, North America, Travel, Travel Destinations, United States, Us A, Us140rf, Walter Bibikow, World Locations

TEM of a Borna disease virus, cause of depression

Borna virus. Coloured Transmission Electron Micro- graph of a Borna virus in a tissue culture. The virus causes the fatal Borna disease in horses and may be a cause of human psychiatric diseases such as clinical depression & schizophrenia. The virus has an outer membrane (envelope, yellow). This encloses the genetic material (blue) which is comprised of Ribonucleic Acid (RNA). Borna infects a wide range of creatures, including humans. It infiltrates the nervous system, being particularly found in parts of the brain, such as the hippocam- pus and hypothalamus, which control emotions and desires. Drugs to treat Borna may cure psychiatric diseases. Magnification: x180, 000 at 6x4.5cm size

© DR JURGEN RICHT/SCIENCE PHOTO LIBRARY