A protein is a polypeptide with more than a hundred amino acid residues, having a molecular mass higher than 10,000u. However, the distinction is not sharp, and polypeptides with fewer amino acids might be called proteins if they exhibit a ...

Dipeptide is a product of the combination of two amino acids through a peptide bond. Similarly, tripeptide, tetrapeptide, and polypeptide are formed by the linkage of three, four, and more than ten amino acids, respectively, through peptide linkages.

A peptide bond, also known as a peptide linkage, is an amide formed between the -COOH group and -NH₂ group of amino acids. It is created through a reaction between the amino group of one amino acid and the carboxyl ...

Amino acids exhibit amphoteric behavior in aqueous solution due to the presence of both acidic (carboxyl group) and basic (amino group) groups, forming a dipolar ion or zwitterion. Naturally occurring a-amino acids, except glycine, are optically active due to the ...

Amino acids synthesizable in the body are termed non-essential, while those that cannot be synthesized and must be obtained from the diet are termed essential.