Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)
Biomolecules · Class 12 · JEE Main Previous Year Question
Following tetrapeptide can be represented as
(F, L, D, Y, I, Q, P are one letter codes for amino acids)
- a
FIQY
- b✓
FLDY
- c
YQLF
- d
PLDY
FLDY
Step 1: Sequence Identification — A tetrapeptide is read from the amino (N) terminus to the carboxyl (C) terminus.
Step 2: Mapping Side Chains — Identifying the side groups in the image: First is Phenylalanine (F), second is Leucine (L), third is Aspartic acid (D), and fourth is Tyrosine (Y).
Step 3: Conclusion — The sequence is FLDY. This matches option (b).
Key Point: Aspartic acid contains a carboxylic acid side chain (), while Phenylalanine contains a benzyl group.
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