Proteins of the Nervous System

The classification of chemical compounds should preferably be based on definite chemical and physical properties of the individual substances. However, at the present time such treatment of most of the proteins is, impossible. Only a few groups-protamines, keratins, globins, collagens, and homologous tissue proteins-can be thus definitely classified. But, in order to have a better understanding of the hypotheses on the structure of the proteins, this discussion will be introduced by a brief summary of a scheme by means of which the proteins can be grouped.45