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. Author manuscript; available in PMC: 2010 Aug 1.
Published in final edited form as: Curr Opin Struct Biol. 2009 May 25;19(4):442–448. doi: 10.1016/j.sbi.2009.04.007

Figure 2.

Figure 2

Schematic illustrating that domain insertion can result in switch properties that are not predictable based on the properties of the biological components from which they are assembled. Insertion of a circular permuted TEM1 β-lactamase into maltose binding protein resulted in a maltose-activated and Zn2+-inactivated allosteric enzyme [30•].