00:02
Okay, so when we think about looking at the amino acids in table 23 .1 and looking for asymmetric carbons beyond the alpha carbon.
00:14
Basically, we're just looking for carol centers, right? so the first thing to kind of think about is when we are assessing our r group, right? the easiest thing that we could do for ourselves is to rule out, you know, 17 out 20 right off the bat.
00:30
If that r starts with an h, like glycine, or if it starts with a ch2 and then has the rest of the side chain, obviously once we hit ch2, we can't have any more, you know, we can't have symmetry at that point anyway.
00:47
And we know that none of our functional groups for, and none of the side chain functional groups have stereo chemistry.
00:57
That's just something we inherently know at this point about.
01:00
These things so easiest thing to do is look for right where you start do you have a ch okay if you have a ch 2 or an h the answer is no and if we have a ch the answer is look at it so let's first start with valine so valine has a ch right next door to our chirocarbon carbon alpha and that carbon has attached to it a ch3 a c8 h3 and an h and obviously the rest of what we just came from.
01:39
Because it has two of the same things attached, our valine is not, does not have a second asymmetric carbon...