[Plasma protein and cerebral soluble protein disc electrophoresis in Down's syndrome]

Blood plasma proteins and soluble proteins from brain lobus frontalis of patients with mongolism were studied using polyacrylamide gel disc electrophoresis. A decrease in content of albumins, proteins of Gc system, transferrine, fast posttransferrines and an increase in amount of immunoglobulin proteins as well as of alpha 2-macroglobulin were observed in the preparations of blood plasma proteins. These alterations were apparently determined by impairments in functions of protein-synthesizing systems. Content of four different protein fractions was altered as shown by brain proteinogramms.