Small tertiary protein structure in which parts of the protein, typically with cysteine and histidine residues, link to a divalent zinc ion, forming a loop or "finger" that attaches proteins to DNA.
Note: A zinc finger is present in many proteins, such as nucleases or
transcription factors that regulate expression of eukaryotic genes.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 822 (https://doi.org/10.1515/pac-2015-1202)