[Disc electrophoresis of urinary proteins. Changes after exertion]

The authors examined, by means of disc electrophoresis, urine, obtained from football players before and after a match of the championship of the "A" republican football group. Proteinuria after effort was manifested by a considerable excretion of albumin, but there were also serum proteins: postalbumin, transferin, gamma-globulins and fractions found at the place of alpha2-macroglobulins till a complete resemblence of serum electrophoresis. Electrophoresis of lactate-dehydrogenase revealed the presence only of two quick fractions, mainly LDH-1, which increased after effort as well. The fractions of nonspecific esterases were of predominantly tissue origin but after effort of serum origin. The results were discussed in connection with various mechanisms, which could cause proteinuria after physical effort.