4M1P:
reference: Cu(I)-mediated allosteric switching in a copper-sensing operon repressor (CsoR)., Chang FM, Coyne HJ, Cubillas C, Vinuesa P, Fang X, Ma Z, Ma D, Helmann JD, Garcia-de los Santos A, Wang YX, Dann CE 3rd, Giedroc DP, J Biol Chem. 2014 Jul 4;289(27):19204-17. doi: 10.1074/jbc.M114.556704. Epub 2014, May 15. PMID: 24831014

This OCA Structure page
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