"Polypeptide chains" refer to long chains of amino acids that are linked together. These chains are an important part of proteins, which are essential molecules for various functions in our body. Full definition
The translocon is an endoplasmic reticulum membrane protein that has the dual ability to insert a newly synthesized polypeptide chain into a cell membrane or secrete it across a cell membrane. (science.sciencemag.org)
Are they translocated as linear polypeptide chains or after folding? (science.sciencemag.org)
The variety of possible sequences for polypeptide chains is tremendous.» (bodybuildingforyou.com)