All materials were purchased as described in the preliminary studies [7 (link),9 (link),13 (link)]. In brief, HEK293H cells, culture medium, all supplements, pcDNA3.1/v5-His TOPOplasmid vector, and the transfection reagent were purchased from Thermo Fisher Scientific (Carlsbad, CA, USA). Additionally, 1-deoxygalactonojirimycin hydrochloride and the synthetic fluorogenic substrate 4-methylumbelliferyl-α-d-galactopyranoside (4-MUG) for α-Gal A activity measurement were purchased from Sigma Aldrich (Steinheim, Germany).
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