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초록· 키워드

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Biologically active recombinant human folliclestimulating hormone (rhFSH) was produced in Chinese hamsterovary cells and purified by a series of chromatographicsteps. The chromatographic steps included anion-exchangechromatography (DEAE Sepharose F/F, Q Sepharose F/F),hydrophobic interaction chromatography (Source 15 PHE),and hydroxyapatite chromatography (Macro-Prep ceramichydroxyapatite type I). A distinctive step of the purificationprocess developed was the use of ZnCl2 for the removal ofnon-glycosylated or lowly-glycosylated FSH and impuritiesthrough co-precipitation with Zn2+. Purified rhFSH was identifiedand characterized by several physicochemical and biologicalmethods such as gel electrophoresis, high-performance liquidchromatography, amino acid analysis, carbohydrate analysis,and biological activity. The overall yield of the purificationwas ~30%. The rhFSH preparation obtained showed highpurity (>99%) and high in vivo potency (>16,000 IU/mg).Carbohydrate analysis suggested that the purified rhFSHcontained approximately 40% (w/w) carbohydrate with diortri-antennary structure on average, which is somewhat moreheavily sialylated than commercially available rhFSH. Inconclusion, the results of these analyses established an identityof the purified rhFSH with natural FSH from human pituitaryglands, and furthermore, the purified rhFSH preparationshowed higher in vivo potency and was slightly more heavilysialylated than commercially available rhFSH.

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