00:02
Okay, so starting with part a, we're talking about doing, forming all the peptides using one valine, one serine, one leucine.
00:10
So the first one obviously is just valine, serine, lucene.
00:16
So the way i solve these problems is i keep the first one and they kind of switch the second one, right? so i can say this is valine, lucine, serine, and then i can switch which, switch which one comes first, right? so i can say, we have serine, valine, leucine, and serine, leucine, valine.
00:38
All right, and then last but not least, i can put leucine in front, so i can say i have lusine, valine, serine, and then lastly, lucine, serine, valing.
00:54
Alright, so going through with the one letter codes, this is going to be vsl, it's going to be vl.
01:01
S, it's going to be svl, it's going to be s -l -v, it's going to be l -v, s, and this is just l -s -v.
01:17
All right, so now i'm going to do this second part.
01:19
Now the important thing to notice about this part is it says l2, right? so it's got two lucine, right? so i'm labeling this part b.
01:28
I want to draw a line through here as best i can.
01:32
Okay, so now the problem is i have two lucines, right? so i've got serine -lucine -lucine -proline.
01:46
Okay, so this actually gives me substantially more ways to kind of mix things around.
01:52
So now i can say i have serine -lucine -proline -lucine, or i can say i've got serine -proline -lucine, or i can say i've got serine -proline -lucine, lucene, lucene.
02:08
Right? so those are just two other options.
02:12
So now i can switch around.
02:13
I can put a leucine in front.
02:14
I can say i've got leucine, and then just serine, lucine, proline.
02:24
And then i can switch those around, keeping the leucine in front...