The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom ...

Amino acids are characterized by their central carbon atom, known as the α-carbon, which is bonded to an amino group (-NH2), a carboxyl group (-COOH), a hydrogen atom, and a variable side chain ...

1907— Adolf Windaus and his associate W. Vogt produce histamine synthetically by removing the carboxyl group from the amino acid histidine. 1910—Henry Dale and his colleagues at the Wellcome ...