So this process by which we can actually pinpoint, detect and then isolate that DNA fragment of interest by using our DNA probe is known as southern blotting. But we also can repeat the same exact process with RNA molecule. So if we have an RNA molecule that we actually want to isolate, we can use an RNA probe or radioactively RNA probe in the same exact process. But if we're dealing with RNA, the process is known as north and blotting. So in the same analogous way, we can conduct the same steps to separate and locate RNA fragments. But instead of using the DNA probe, we use a radioactively labeled RNA probe in this process is known as north and Blotting.