The Type II kind is usually a homodimer, while the Type I variety requires ATP and acts thousands of base pairs away from the recognition site.
Some types of these when placed in high glycerol concentration or high pH can exhibit atypical behavior called star activity. They often require positive ions as cofactors, such as the magnesium ion required for one derived from Haemophilus influenzae. The Type II kind is usually a homodimer, while the Type I variety requires ATP and acts thousands of base pairs away from the recognition site. Some create "blunt" ends, but only those that leave "sticky" ends can be used to insert genes into plasmid vectors. Commonly used examples of these include BamHI ["Bam H One"] and EcoRI ["Eco R One"]. For 10 points, identify these bacterial enzymes that cut DNA at specific sequences.
Some types of these when placed in high glycerol concentration or high pH can exhibit atypical behavior called star activity.
{restriction enzyme}s [or {restriction endo nuclease s}]