And right next to this arbitrary x, we have to have either threeline or serene. So only if the sequence is like these two sequences will that sparrogene actually be modified. On top of that, what also determines the amino acids where we modify is the actual structure of that protein and the cell that is actually carrying out that protein glycosylation process. So we see that it also depends the size of glycosylation also depends on the type of cell that is producing that protein and on the overall structure of that protein itself. Now, what exactly is the general process by which protein glycosylation actually takes place inside the organelles of our cell and which organelles are responsible for the process of protein glycosylation? So let's take a look at the following diagram.