CCHX zinc finger derivatives retain the ability to bind Zn(II) and mediate protein-DNA interactions.
Simpson, R.J., Cram, E.D., Czolij, R., Matthews, J.M., Crossley, M., Mackay, J.P.(2003) J Biol Chem 278: 28011-28018
- PubMed: 12736264 
- DOI: 10.1074/jbc.M211146200
- Primary Citation of Related Structures:  
1P7A - PubMed Abstract: 
Classical (CCHH) zinc fingers are among the most common protein domains found in eukaryotes. They function as molecular recognition elements that mediate specific contact with DNA, RNA, or other proteins and are composed of a betabetaalpha fold surrounding a single zinc ion that is ligated by two cysteine and two histidine residues ...