Recombinant human
alpha glucosidase (rhGAA) compositions derived from CHO cells are disclosed, comprising a more optimal
glycan composition consisting of rhGAA with higher amounts of N-glycans bearing
mannose-6-
phosphate (M6P) or bis-M6P, along with low amounts of non-phosphorylated
high mannose glycans, than conventional rhGAA, along with low amounts of terminal
galactose on complex oligosaccharides. Compositions comprising the rhGAA are described, as are methods of use.