Abstract
The production and secretion of human lactoferrin (hLF) in Aspergillus nidulans is described. The hLF cDNA was expressed under the control of the strong ethanol-inducible alcohol dehydrogenase ( alcA) promoter. Recombinant hLF (rehLF) is produced at levels up to 5 μg/ml. Approximately 30% of the re-hLF produced in this system is secreted into the growth medium. The re-hLF is indistinguishable from native hLF with respect to size and immunoreactivity. Furthermore, re-hLF is functional by the criterion of iron-binding capacity. The A. nidulans expression system offers an inexpensive, convenient method for the controlled production of mg amounts of biologically active mammalian glycoproteins.
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