L-Aminoacids are represented by writing the –NH2 group
on left hand side You have already read that proteins are the polymers of a-amino acids
and they are connected to each other by peptide bond or peptide
linkage Chemically, peptide linkage is an amide formed between
–COOH group and –NH2 group The reaction between two molecules of
similar or different amino acids, proceeds through
the combination of the amino group of one molecule
with the carboxyl group of the other