What is an example of a restriction endonuclease?
Penicillin
EcoRI
Cortisol
Hemoglobin
Answer
EcoRI is a restriction endonuclease, an enzyme that cuts DNA at specific palindromic sequences known as restriction sites. These enzymes play a vital role in genetic engineering and biotechnology, enabling the manipulation and recombination of DNA from different sources. EcoRI, derived from the bacterium Escherichia coli RY13, recognizes and cleaves the DNA sequence 5'-GAATTC-3', generating "sticky ends" that can be easily ligated to complementary sequences in other DNA molecules.
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