Question

In the standard nomenclature convention for restriction endonucleases, what do the second and third letters signify?

Options

• The species of the bacterium from which the enzyme was isolated

• The order of discovery of the enzyme in that bacterial strain

• The genus of the bacterium from which the enzyme was isolated

• The strain designation of the bacterium

Answer 1

In restriction enzyme nomenclature, the first letter is capitalized and derived from the genus, the second and third letters are lowercase and derived from the species, the fourth letter indicates the bacterial strain, and the Roman numeral indicates the discovery order.