Following tetrapeptide can be represented as

(Structure shows: Ala–Leu–Asp–Tyr connected by peptide bonds, N→C direction)

(F, L, D, Y, I, Q, P are one letter codes for amino acids)

Question

Following tetrapeptide can be represented as

(Structure shows: Ala–Leu–Asp–Tyr connected by peptide bonds, N→C direction)

(F, L, D, Y, I, Q, P are one letter codes for amino acids)

Canvas Classes · Accepted Answer

Reading the tetrapeptide structure:

The SMILES given:

Identifying each residue from N-terminus to C-terminus:

Residue 1 (N-terminus):  — alanine side chain (–CH₃) → Ala (A)... but wait, checking one-letter codes: A=Ala, but the options use F,L,D,Y.

Re-reading: The N-terminal amino acid has –CH₃ side chain = Ala. But Ala is not in the options list (F,L,D,Y,I,Q,P).

Actually the SMILES shows:
- N-terminal: –CH(CH₃)– = Ala...

Looking at answer (2) FLDY:
- F = Phenylalanine (–CH₂C₆H₅)
- L = L

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