Complex sentence: There are exceptions but levels of alpha-glucosidase determines the type of GSD II an individual may have more alpha glucosidase present in the individuals muscles means symptoms occur later in life and progress more slowly.
Split into simpler sentences: There are exceptions but levels of alpha-glucosidase determines the type of GSD II an individual may have. More alpha glucosidase present in the individuals muscles means symptoms occur later in life and progress more slowly.