Morquio syndrome, also known as mucopolysaccharidosis type IV (MPS-IV), is a rare genetic disorder that is part of a group of eleven lysosomal storage diseases known as mucopolysaccharidoses (MPS diseases). It is caused by deficiency of the enzyme N-acetylgalactosamine-6-sulfatase (GALNS), which is responsible for the breakdown of glycosaminoglycans (GAGs) known as keratan sulfate and...
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