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DNA chemistry

DNA chemistry

G110/0831

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Credit

KENNETH EWARD / BIOGRAFX / SCIENCE PHOTO LIBRARY KENNETH EWARD / BIOGRAFX / SCIENCE PHOTO LIBRARY

Caption

DNA chemistry. Computer model of part of the DNA chemistry of the E. coli bacterium (Escherichia coli). A DNA (deoxyribonucleic acid) strand (blue) is being modified by a CAP protein (orange/purple) so that a gene (DNA section) can be activated. The CAP (catabolite gene activation protein) is bound to a DNA promotor region, allowing RNA polymerase (a genetic transcriptor) to 'read' the genes that contain the instructions for making the enzymes for lactose metabolism. This use of a CAP allows the bacteria to adapt to conditions where glucose (its normal food source) is not available, and to metabolise lactose instead.

Release details

Model release not required. Property release not required.

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