Abstract
Transgenic Laminaria japonica gametophytes producing a recombinant tissue-type plasminogen activator (rtPA) protein, which is an effective third-generation thrombolytic agent for acute myocardial infarction (AMI), were cultured in an illuminated bubble column bioreactor. A maximum final dry cell weight of 1120 mg l(-1) was obtained in batch culture with an initial dry cell weight of 126 mg l(-1) and with aeration rate of 1.2 l air min(-1 )l(-1) culture, nitrate at 1.5 mM: and phosphate at 0.17 mM: . The yield of rtPA was 56 microg g(-1) dry cell wt. This is the first report regarding cultivation of a transgenic macroalga in a bioreactor.
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