restriction enzymes produce "blunt" ends when they cut in the middle of the recognition sequence, and they yield "sticky" ends when they cut at the recognition sequence in a staggered manner ...

And they cut double-stranded DNA ... The enzyme cuts in two ways: one is staggered, creating sticky ends, and the other is cleaving double strands at the same location, creating blunt ends. Type II ...

If a foreign king invades a bacterium, this servant can cut him in small ... similarly produces blunt-end fragments). Mertz and Davis discovered that another restriction enzyme, EcoR1, by contrast ...