What is a restriction enzyme?
Restriction endonuclease, often called molecular scissors, are used to cut DNA at specific locations.
Restriction enzymes identify a special sequence of DNA known as a palindromic sequence.
Palindromic sequences occur when the 5'-to-3' sequence is the same on each DNA strand. They are identical when one strand read left to right , is the same as another strand read right to left .
Restriction endonuclease cuts the DNA at these palindromic sites.