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Biotechnol Lett. 2003 Aug;25(15):1281-5.

Large-scale production and purification of recombinant Galanthus nivalis agglutinin (GNA) expressed in the methylotrophic yeast Pichia pastoris.

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  • 1Quality, Health & Nutrition Group, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, Scotland.


The gene coding for agglutinin from Galanthus nivalis (GNA) was expressed in, and secreted by, the methylotrophic yeast, Pichia pastoris. Transformants of P. pastoris were selected and a process to produce and purify gram quantities of recombinant GNA was developed. GNA was secreted at approximately 80 mg l(-1) at the 200 1 scale and was purified to 95% homogeneity using hydrophobic interaction chromatography. The recombinant protein was similar to the protein synthesised in plant with respect to structure and biological activity.

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