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wood prints history wood prints medicine wood prints immunology wood prints coloured wood prints illustration wood prints 20th century wood prints 1900 wood prints antibodies wood prints antibody wood prints cell wood prints chains wood prints chemical wood prints colored wood prints cut out wood prints cut-out wood prints

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Ehrlich's side-chain theory, artwork. Coloured 1900 diagram by the German immunologist Paul Ehrlich (1854-1915) to explain his side-chain theory of immune response. This theory suggested that the chemical structure of cells was responsible for the action of immune recognition. He postulated that living cells had side-chains that could link with a particular toxin 'like a key in a lock', that under threat a cell grew additional side-chains to bind the toxin, and that these additional side-chains broke off to become the antibodies that circulate through the body. Image from 'La Conquete Du Monde Invisible' by Giuseppe Penso.

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