Now notice, because we use the same restriction enzyme to cut these two DNA molecules, these sticky ends will be complementary with respect to one another. So what that means is this sticky end right over here will be complementary to this sticky end right over here. And likewise this sticky end right over here will be complementary to this sticky end right over there. And so what happens is if we take a special enzyme known as DNA ligase that is able to reform these bonds between this section and this section and between this section and this section, then if we add this DNA lie gaze into the mixture. What happens is this entire section will be placed onto this complementary section. And this entire section will be placed onto this complementary section.