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Phytochrome Knot shown as thicker backbone. The backbone is colored with a rainbow sequence from the Amino to Carboxy ends. The ends are marked with balls. Conceptually, pulling on the ends would straighten the backbone, revealing the knot. The biliverdin chromophore is shown in ball-and-stick with a dot surface. The dotted line represents a portion of the backbone that could not be resolved due to crystallographic disorder. Made with MolSlides.Org

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More information is available about knots in proteins, including movies of "pulling the string" to reveal the knot. Made with MolSlides.Org

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