- A restriction enzyme is an enzyme isolated from bacteria that cuts DNA molecules at specific sequences. The isolation of these enzymes was critical to the development of recombinant DNA (rDNA) technology and genetic engineering.
Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute
- A protein that recognizes specific, short nucleotide sequences and cuts DNA at those sites. Bacteria contain over 400 such enzymes that recognize and cut more than 100 different DNA sequences.
Definition from: Human Genome Project Information
at the U.S. Department of Energy
See also Understanding Medical Terminology.