Congenital Disorders of Glycosylation (CDG) are a group of genetic diseases that are caused by defects in protein glycosylation. Phosphoglucomutase-1 deficiency (PGM1-CDG, read more below) was recognised recently and one of the tasks of this enzyme is the storage of sugar (energy), even if this energy is not needed, in order to release energy when it is necessary. Another task of the enzyme is to paste sugars to proteins.
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