Fischer projection

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The Fischer projection is a two-dimensional representation of a linear monosaccharide showing the stereochemistry. The figure below shows - from left to right - (a) a wedge-and-dashes representation of glucose in a relaxed conformation, (b) glucose in a conformation where the carbon chain is in an all-syn conformation, (c) with the carbon chain on the vertical axis and (d) the Fischer projection. This insightful series of images is from

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The 3D image shows glucose in the all-syn conformation. You can rationalize the Fischer projection by centering on each carbon atom, keeping carbon 1 (the aldehyde function) on top and the carbon chain curved backwards. The coordinates of glucose are from

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Karsten Theis

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