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Abstract
Bone morphogenetic protein 2 (BMP2) is important for bone tissue repair. The goal of this research is to construct a high level human BMP2 (hBMP2) expression system using transgenic tobacco plants as a bioreactor. Cauliflower mosaic virus (CaMV) 35S promoter, alfalfa mosaic virus (AMV) enhancer, tobacco mosaic virus (TMV) enhancer, matrix attachment regions (MARs) sequence, and "Kozak" sequence were used to construct recombinant expression vectors and the high-expression vectors were screened out through GUS-fusions assay. The promoter is the most important factor; double-CaMV 35S promoter is more effective than single promoter. The AMV or TMV enhancer is able to promote the foreign protein expression. After four-step purification, the activated hBMP2 (0.02% total soluble protein) was obtained. Our results suggested that the transgenic tobacco has great potential to be used as a bioreactor to produce hBMP2.
Published Version
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