A.B. DOWSETT / SCIENCE PHOTO LIBRARY A.B. DOWSETT / SCIENCE PHOTO LIBRARY
Erwinnia chrysanthemi. Coloured Transmission Electron Micrograph of the bacterium Erwinnia chrysanthemi. Long flagellae can be seen; shorter filaments known as pili are also visible on the cell wall. E. chrysanthemi is a Gram-negative rod- shaped bacteria of the Enterobacteriaceae group. In nature, it causes vascular wilting in a wide range of plants. In the laboratory, this bacteria is grown for the enzyme L-asparaginase which it contains. The enzyme is extracted from E. chrysanthemi and purified as a drug for acute lymphoblastic leukaemia (ALL). ALL is a cancer of white blood cells found largely in children. Magnification: x24, 000 at 6x4.
Model release not required. Property release not required.