And we'll discuss that in much more detail in a future lecture. Now, the final thing that I like to mention is the tRNA molecule or the transfer RNA molecule as we'll see in a future lecture there are many types of RNA molecules that exist inside our cells and these RNA molecules can basically act in certain specific ways. One of these RNA molecules is the tRNA molecule and this is the shape that the tRNA molecule actually takes. So we have one, two, three of these loops and these loops are a result of these mismatched nucleotides and so they destabilize the structure ever so slightly. But we also have these stabilizing regions, the stem regions where we have these complementary sequence of nucleotides. For example, here we have Ugcg and this is ACGC which is complementary to that blue sequence.