Abstract
Expression of scFv in Brevibacillus choshinensis was tested using combinations of three different promoters and four different secretion signals. Two model scFv constructs, i.e., His-scFvFLU and His-scFvHEL, were successfully expressed with some of the combinations. Ni Sepharose column and size exclusion chromatography resulted in fairly pure preparations of these two proteins. The purified His-scFvFLU inhibited fluorescence from fluorescein, while the purified His-scFvHEL inhibited lysozyme activity. Relatively high yield of His-scFvFLU (∼40%) and His-scFvHEL (∼30%) was achieved with the expression and purification system described here.
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