An amino group is a functional group in organic chemistry that consists of a nitrogen atom bonded to two hydrogen atoms, represented as -NH2. It is a key component of amino acids, which are the building blocks of proteins. The presence of an amino group gives amino acids their basic properties and plays a crucial role in the formation of peptide bonds during protein synthesis. In addition to proteins, amino groups are also found in various biological molecules and are involved in important biochemical processes. They can act as bases, accepting protons in chemical reactions, which contributes to the overall pH balance in living organisms.