Chitin structure, X-ray diffraction image

Chitin structure, X-ray diffraction image

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Credit: KING'S COLLEGE LONDON ARCHIVES/SCIENCE PHOTO LIBRARY

Caption: Chitin structure. X-ray crystallography diffraction pattern obtained as part of research to determine the structure of the biological polymer chitin, found in animals such as insects and crustaceans. This image, from a crab sample, is by British biophysicist Anthony North while a student at the MRC Biophysics Research Unit at King's College London, UK. It was here in the early 1950s that Maurice Wilkins, Rosalind Franklin, and other crystallographers obtained X-ray diffraction patterns for DNA that led to James Watson and Francis Crick's DNA double helix model. As well as DNA, the King's College researchers investigated other materials.

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