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Expression and purification of B1. (A) SDS–PAGE and (B) Western blot analysis of the scFv B1 before (lane 1) and after purification (lane 2). The scFv B1 was purified and refolded at the same time by gel filtration through a column with Sephacryl S200HR. The membrane with scFv B1 was blotted by using anti-His-6-Tag.
