![]() And so it summarizes those key differences. And so really this little chart right here summarizes many of the most important and most tested on uh differences between gram positive and gram negative cells. Now in terms of tech OIC acids, gram positive cells are going to have to colic acid so they will be present in grand positive cells however, and gram negative cells the tech OIC acids are absent, so gram negative cells do not have to coke acids and the liberal policy sacha rides are going to be absent in Grand positive cells, but they will be present and gram negative cells. And again that is being represented up above as well, where you can see the thick layer of potato blake can and gram positive and the thin layer of peptidoglycan and the gram negative. However, with gram positive cells they have a thick layer of peptidoglycan, whereas in gram negative cells they have a thin layer of potato black hand. In terms of the peptidoglycan layer, both gram positive and gram negative cells have cell walls made of peptidoglycan. ![]() And once again the outer membrane is this membrane that you see up above right here. And so the outer membrane is going to be present here and gram negative cells. So in terms of the outer membrane, gram positive cells do not have an outer membrane, that outer membrane is specific to gram negative cells. And so down below what we have is this little chart that helps to summarize a lot of those uh important key features. And then there are wall to coke acids which do not connect directly to the plasma membrane and instead they're mainly embedded in the potato blight can layer. Now the grand positive cells, they have these tech OIC acids, there are light biotech OIC acids which will connect directly to the cell membrane or the plasma membrane. Um The gram negative cells are going to have lipoproteins that are going to help anchor the entire outer membrane to the potato black hand layer and the outer membrane is going to have lipo policy Sacco rides and or uh endo toxin or LPS and embedded within this outer membrane are also going to be pouring that will allow molecules to be transported across the membrane. In comparison to the layer of peptidoglycan over here with gram negative cells which is very thin. Now in terms of the peptidoglycan layer, noticed that the gram positive cells on the left, they have a thick layer of potato blight can. And so they both have a plasma membrane and a perry plaza. They both also have a peri plasm or perry plasvic space which is the space or the gel like fluid in between the potato blight can and the cell membrane or the plasma memory. All cells have a plasma membrane and so that is something that is similar between the two. So, one thing to note is that in both gram positive and gram negative cells there is a plasma membrane. Whereas on the right hand side over here we're focusing in on gram negative cells. And so notice that down below we have an image that is organized into a table and on the left hand side over here we are focusing in on gram positive cells. However, if you're struggling or need even just a little bit more help then feel free to stick around because this video might be very helpful for you. And so since there's no new information that's being covered, if you're already feeling really good about the differences between gram positive and gram negative cells, then feel free to skip this video if you'd like. And so in this video we're only going to be reviewing information that we already covered in our previous lesson videos. In this video, we're going to do a side by side comparison of gram positive versus gram negative cells.
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