Question

Name three of the four peptides for which proenkephalin is the precursor.

Short answer

Question: Name three peptides derived from the precursor protein proenkephalin. Answer: Met-enkephalin, Leu-enkephalin, and Penk A.

Step-by-step solution

Understand Proenkephalin

Proenkephalin is a precursor protein that is cleaved to produce several biologically active opioid peptides. These peptides play essential roles in pain modulation and various physiological functions.

Recall the Peptides Derived from Proenkephalin

Proenkephalin is the precursor of four major biologically active peptides: Met-enkephalin, Leu-enkephalin, Penk A, and Penk B.

Choose Three Peptides

For this exercise, we can choose any three of the four peptides derived from proenkephalin. For example: 1. Met-enkephalin 2. Leu-enkephalin 3. Penk A Alternatively, one can also choose Penk B instead of any of the mentioned peptides.