JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Fermentation unit. Dr Ian Ross examining a reaction in a fermentation unit, or bioreactor. The bacteria it contains, Escherichia coli (E. coli), have been genetically engineered to convert the naturally-occurring drug morphine into the painkiller hydromorphine. This is a simple, efficient and low maintenance way of making this drug. Photographed at the Institute of Biotechnology, Cambridge University, England.
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