In this video, we're going to talk about the structure of the flagella and gram-positive cells. Specifically, the structure of the gram-positive basal body of flagella. And so, the basal bodies of the flagella in gram-positive cells actually consist of 2 complex protein rings, as we'll see down below in our image. And so, what you'll notice is that these two rings of the basal body are numbered down below right here. And the first ring of the basal body is the MS ring, whereas the second ring of the basal body is the C ring. And so the MS ring is this ring that you see right here, going around, from here to here. And the C ring is this other ring that's going around right here. And so, these two rings are the two rings that are found in the gram-positive basal body.
Now, in this image, just to orient you a little bit better, what you're looking at here is this is zoomed into the flagella. This is the flagella, the structure of the flagella, the flagella. And so, notice that up here what we have is the filament. Here what we have is the hook. And then, from here all the way down, what we have is the basal body. And notice that the basal body anchors the entire flagella to the actual bacterial cell. And so you can see the layers of the gram-positive cell here. The thick peptidoglycan layer is right here. Then you can see the periplasm, which is in between the peptidoglycan layer and the plasma membrane, and the plasma membrane is down below here. And so, the basal body extends all the way through those layers of the cell envelope. And these rings are important for helping to anchor the entire flagella to the cell. And once again, the two rings are the MS ring and the C ring. And we'll be able to compare these structures to the structures of the basal body in gram-negative cells in our future videos. But for now, this here concludes our lesson on the structure of the gram-positive basal body, and I'll see you all in our next video.