Question

What are peptides and peptide linkage? Explain with example.

Answer 1

The molecules having peptide linkage are known as peptides.
Peptide linkage is also known as peptide bond. it is an amide formed between $-COOH$ and $-N{H}_2$ group by elimination of a water molecule. It is represented as
$-\underset{\underset{\text{O}}{||}}{C}-NH-$.
For example, following represents a dipeptide formed between two glycine molecules.
$H_{2}N-C{H}_2-COOH+H_{2}N-C{H}_2-COOH\underset{-H_{2}O}{\overset{\Delta }{\to }}{H}_{2}N-C{H}_2-\underset{\underset{\text{O}}{||}}{C}-NH-C{H}_2-COOH$.