A rare simple sugar (monosaccharide) that is one of the eight possible isomers of glucose, differing in the arrangement of its atoms.
From 'allo-' (Greek for other/different) + '-ose' (suffix for sugars). Named because it is structurally different from glucose while having the same molecular formula (C6H12O6).
Allose is a perfect example of isomerism—it has the exact same atoms as glucose (same molecular formula), but arranged differently, which means the body processes it completely differently; it's like having the same LEGO bricks arranged into a different shape.
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