It is subsequently methylated by the host methylase. It is able to do this because it is a homo-dimer protein. They are one of the primary tools in modern molecular biology for the manipulation and identification of DNA sequences. Restriction endonucleases are commonly named after the bacterium from which it was isolated. Leaves 5' overhang.
Middle base can be either cytosine or guanine.
Leaves 5' overhang. Different recognition sites may have non-complementary sequences. Leaves 5' overhang. Leaves 3' overhang. Leaves 5' overhang.