Anthrax lethal factor, molecular model. Lethal factor (LF) is one of the toxins produced by spores of the bacterium Bacillis anthracis. Spores enter the body and release their toxins, including LF which cleaves an enzyme vital for cell signalling. This renders the cells unable to function normally. If inhaled, anthrax is often fatal. The disease most commonly affects cattle, sheep and goats, but can also infect humans. In this model, solid colours represent the secondary structure of the protein (spiral ribbons are alpha helices; arrows are beta sheets), and the faded tubular structure behind represents the individual atoms and bonds.
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
Shop with Confidence (Fine Art America Return Policy)
Our return policy is very simple:
If you're not happy with a purchase that you made on FineArtAmerica.com, for any reason, you can return it to us within 30 days of the order date. As soon as it arrives, we'll issue a full refund for the entire purchase price. Please note - Fine Art America does not reimburse the outgoing or return shipping charges unless the return is due to a defect in quality.