“…At shake flask level, intracellular crude extract enzyme activity was 2.8 nmol min −1 mg −1 , while the extracellular enzyme activity was 1.2 nmol min −1 mg −1 [53]. Western-blot analysis of this recombinant IDS showed a band profile different to that expected for the human IDS, with four bands (62, 52, 49 and 40 kDa) for the intracellular enzyme, and five bands (97,49,43,41 and 40 kDa) for the extracellular enzyme [53,54]. Later, recombinant IDS was produced in E. coli K12, DH5α, which allowed a significant improvement in the enzyme activity reaching up to 34.20 nmol h −1 mg −1 in the intracellular crude extract and a production of 94.3 ng IDS mL −1 [54].…”