00:01
So this question at its core is just asking about the structure of every amino acid.
00:06
And even though every amino acid is different, there are tons of different types.
00:10
Really, they all have the same basic structure.
00:12
And the only thing that changes is what's called the r group, and that's the side chain.
00:16
But we'll get to that in a second.
00:18
So every amino acid, no matter what kind, has this central carbon.
00:23
And that central carbon is connected to another carbon that's double bonded to one oxygen and single bonded to another.
00:29
And we know oxygens like to have two bonds.
00:33
That's where they're most stable.
00:34
This oxygen, because it only has one bond, is actually a little less stable, and it has this negative charge here, and it likes to bind to hydrogens that are floating around.
00:46
And this is what's called a carboxyl group.
00:53
Every amino acid has one.
00:55
Every amino acid also has, on the other side, the central carbon bonded to a nitrogen and three hydrogens...