00:01
All right, so we are designing amino acids right now.
00:06
So basically we want to make an l -amino acid with an r configuration like sistine.
00:12
So you'll remember that the reason sistine is different than most amino acids is because its configuration is swapped.
00:20
But the real way to do this, right, so if i'm drawing my fisher projection, c -o -o -h, right, i'll draw h -h3, make sure this is an l configuration and then i have my r group right so typically the way this configuration goes is it goes one two three four so that kind of goes in that normal look in our configuration but you got to remember that since this hydrogen is kind of on a assumed dash that this is actually backwards making this an s configuration so now the question is how do we make an our configuration.
01:03
The answer is you want something that goes counterclockwise, right? so you could, for example, have something that goes one, two, three, four, right? notice that this goes counterclockwise.
01:18
So when you flip the configuration to account for the hydrogen, this would be normally s, but it's instead r.
01:24
So when we're designing this r amino acid, basically what we need is this type of configuration, where i have one pointing down to the left.
01:31
Four to the right and three up top...