So remember, a recombinant DNA molecule is a DNA molecule that consists of two or more different DNA sequences, DNA molecules. So to see what we mean by that, let's take a look at the following diagram. So let's suppose we have two different DNA molecules. So DNA molecule number one and DNA molecule number two that basically came from two different sources. And what we want to do is we want to somehow combine these two DNA molecules and to form a single recombinant DNA molecule that consists of these two different DNA molecules. So the way that we do it is we basically realize that let's say these two different DNA molecules both contain these Palindromic sequences that we discussed earlier.