Controlling allostery using redox chemistryElectronic supplementary information (ESI) available: Experimental and X-ray structure determination and crystal data for [Cu(1)][PF6]. See http://www.rsc.org/suppdata/cc/b1/b109051h/

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Abstract
The binding of a hydrogen-bonding receptor to its substrate is reversibly regulated by varying the oxidation state of a copper allosteric cofactor.