Protein backbone
= Protein backbone
The <protein backbone> is the repeating chain of <chemical atoms> that connects successive <amino acid residues>, including their <peptide bonds>. The attached groups that distinguish <amino acids> project from this shared framework. <Protein folding> changes the framework's spatial arrangement while ordinarily preserving its sequence connectivity. See https://www.ncbi.nlm.nih.gov/books/NBK9879/[Cooper: polypeptide backbone and attached groups].