Question:

Peptide based on the given sequence is called: Cysteine-aspartate-glutamate-alanine

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Suffix “-yl” for the followers, full name for the last one.
Updated On: May 28, 2026
  • Cysteinyl-aspartate-glutamate-alanine
  • Cysteine-aspartyl-glutamyl-alanyl
  • Cysteine-aspartyl-glutamyl-alanine
  • Cysteinyl-aspartyl-glutamyl-alanine
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The Correct Option is D

Solution and Explanation

Step 1: Concept
When naming peptides, residues are named from the N-terminus to the C-terminus.

Step 2: Meaning

All amino acids except the last (C-terminus) change their suffix to “-yl”.

Step 3: Analysis

Cysteine $\to$ Cysteinyl, Aspartate $\to$ Aspartyl, Glutamate $\to$ Glutamyl. Alanine, being at the end, retains its name.

Step 4: Conclusion

The correct name is Cysteinyl-aspartyl-glutamyl-alanine.

Final Answer: (D)
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