= Peptide bond
{title2=$-\mathrm{C}(=\mathrm{O})-\mathrm{NH}-$}
{wiki}
A <peptide bond> is the <covalent bond> between the carboxyl <carbon> of one <amino acid residue> and the amino <nitrogen> of the next. The displayed group shows the usual linkage, with the central carbon–nitrogen connection being the <peptide bond>. In an intact unbranched chain of $n$ <amino acid residues>, adjacent positions supply $n-1$ <peptide bonds>. Cutting one internal <peptide bond> produces two fragments; merely changing the chain's shape need not cut it. See https://openstax.org/books/biology-2e/pages/3-4-proteins[Clark, Douglas and Choi, Biology 2e: peptide bonds and protein structure].
Back to article page
