Enhanced in vivo uptake of glucocerebrosidase

A pharmaceutical composition comprising remodelled recombinant glucocerebrosidase (GCR) is described that provides a therapeutic effect at doses that are lower then those required using remodelled naturally occurring GCR. A method of treating patients with Gaucher's disease using remodelled recombinant GCR is also provided. In vivo uptake of exogenous molecules can be determined by extracting a mixture of cells from a subject, enriching the target cells in vitro, lysing the cells and determining the amount of exogenous molecules.