So glycoproteins are an important class of biological molecules that play a variety of different roles inside our cells and inside our body, as we'll see in future lectures. And they can be found along the cell membrane. They can also be found in the extracellular matrix. For instance, in our blood plasma, which is an example of an extracellular matrix, we'll find many different types of glycoproteins that play a variety of different roles. Now, how exactly does the process of protein glycosylation actually take place? This is what we're going to focus on in the remaining of this lecture.