And we can use the lambda phage to basically infect the bacterial cells and the bacterial cells can then replicate that DNA of interest. So in step three, we basically take cohesive ends and we add the cohesive ends onto the ends, the edges of these DNA molecules. So for example, we take this light purple DNA molecule that we isolated in step two, and we add these cohesive ends onto the end of the DNA molecule and then we insert it into a lambda DNA phage molecule. So we essentially extract a lambda DNA phage molecule from the lambda phage and we cut that molecule with restriction enzymes. And then we insert that DNA fragment into the lambda DNA phage molecule, the lambda phage DNA molecule. And so this is basically what we produce.