tokens: Although it has two potential binding sites , the purified MerR homodimer binds only one Hg ( II ) ion , employing Cys82 from one monomer and Cys117 and Cys126 from the other .
folded_tokens: although it have two potential binding site , the purify merr homodimer bind only one hg ( ii ) ion , employ cys82 from one monomer and cys117 and cys126 from the other .