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Exendin-4, a peptide analogue of glucagon-like peptide-1 (GLP-1), has been developed for treatment of type 2 diabetes. Herein, the secretive exendin-4 fusion protein, expressed by methanol induction in Pichia pastoris system, was purified to homogeneity by chromatography followed by enterokinase cleavage of the fusion protein and subsequent purification of the recombinant exendin-4. Purity of the...
The β-glucan (BG), extracted from Saccharomyces cerevisiae cell wall, was orally administrated to the mitten crab (Eriocheir sinensis) at 0, 1, 5 and 10 g BG/kg diet for 28 days, followed by a challenge with Vibrio mimicus by intramuscular injection. Growth, phenoloxidase, superoxide dismutase, acid phosphatase and alkaline phosphatase activity were monitored after 14 and 28 days. The results showed...
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