What is the amino acid sequence of the peptide depicted...

Name: What is the amino acid sequence of the peptide depicted below? Write down the sequence from the N- to the C-terminus, and use only the one-letter abbreviations, e.g. AGCNT (note: write in all capital letters, with no spaces between the letters, just as in that example).
Uploaded: 2022-02-12T18:42:40-08:00
Duration: 5 min 16 s
Channel: Joanna Quigley
Description: What is the amino acid sequence of the peptide depicted below? Write down the sequence from the N- to the C-terminus, and use only the one-letter abbreviations, e.g. AGCNT (note: write in all capital letters, with no spaces between the letters, just as in that example).

What is the amino acid sequence of the peptide depicted below? Write down the sequence from the N- to the C-terminus, and use only the one-letter abbreviations, e.g. AGCNT (note: write in all capital letters, with no spaces between the letters, just as in that example).

Transcript

00:01 We've been given a peptide and we need the amino acid sequence.

00:04 We're going from the n to the c terminus.

00:07 So first we have to find the n terminus is at the top or the bottom.

00:12 Well, the top has an exposed nh3 plus.

00:17 This is the n terminus.

00:19 So that's where we're starting off.

00:20 We can see it's connected to its carbon hydron.

00:25 This is the carbonile.

00:28 And this here is our first.

00:32 Side chain.

00:35 So this is just the top.

00:36 So we've got the amino group here, central carbon, amino, central carbonile, and this here is the side chain.

00:48 So that's what we're starting.

00:50 Okay.

00:53 So what is that side chain? give me some space to write out the answers.

01:03 Okay, so we have a c -h -2 and then an o -h.

01:09 So that is serene.

01:13 So if i draw it as a skeleton instead, we have the central carbon here, and it comes out like this.

01:22 This is serine.

01:25 Okay, next one.

01:28 So if we go past the carbon oil, we see another amino group, another central carbon, and we have c -h2 into so this is the next one.

01:40 Sulfur, well only two acts we have sulphur in, and that's methionine and cysteine.

01:47 Which one is this? this one is cysteine.

01:51 Methyane has it in the middle of its chain, so methionine, instead of the hydrant here, would continue out into a methyl group.

02:00 But this one is cysteine, because it has the solfer at the end of its chain.

02:05 So just notice it wants the letters, so serine is s, cysteine is c.

02:14 Okay? so there are 20 amino acids, and honestly if you have to memorize the structures, flashcards are a really good idea.

02:27 Going on to the next one, we have a carbon here, and it splits off into two...

Question

What is the amino acid sequence of the peptide depicted below? Write down the sequence from the N- to the C-terminus, and use only the one-letter abbreviations, e.g. AGCNT (note: write in all capital letters, with no spaces between the letters, just as in that example).

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