WIM VAN EGMOND / SCIENCE PHOTO LIBRARY WIM VAN EGMOND / SCIENCE PHOTO LIBRARY
Lactococcus lactis. Light micrograph of a colony of Lactococcus lactis bacteria. This bacterium metabolises lactose, a sugar found in milk, to produce lactic acid. It is used in the production of cheese, buttermilk, and other fermented foods. It is also the first genetically modified live organism to be used in the treatment of human disease. Magnification: x630 when printed at 10 centimetres wide.
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