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(a) Construction of expression vector of Deinococcus geothermalis amylosucrase (DGAS). (b) SDS-PAGE analysis of recombinant DGAS expressed in Escherichia coli and purified on a nickel– nitrilotriacetic acid affinity column. (Lane M, protein molecular standard marker; Lane 1, crude enzyme; Lane 2, crude passing through enzyme; Lane 3, inclusion body; Lane 4, purified enzyme).
