00:01
In order to understand what endotoxin is, we're going to need to learn about the differences between gram -positive and gram -negative bacteria.
00:09
So here i've drawn the external part or the outer layers of a gram -positive and a gram -negative bacterium.
00:16
First thing to note is that the interior membrane here can be called the inner membrane or the cytoplasmic membrane, and that's going to be fundamentally similar between both of these.
00:27
Now, moving outward, let's look at this blue layer of peptidoglycan that is found on both positive and negative bacteria.
00:41
In gram -positive bacteria, this peptidoglycan cell wall might be covered on the outside by a capsule or a slimy coat.
00:51
And on the inside, it is separated from the cytoplasmic membrane just by a sort of gel -like area.
01:02
In contrast, on the gram -negative bacterium, we're going to see that our peptidoglycan is sandwiched in between matching membranes in an area called the periplasm...