[Amino acid composition of serum and liver albumin in rabbits of different ages].

Studies have been made on the molecular weight and amino acid composition of albumin from the blood serum and liver, as well as on its content in liver extracts and in the blood serum of male rabbits at the age of 1, 30, 180, and 720 days. During postnatal life, quantitative changes in the amino acid composition of the proteins investigated take place, which are more significant in liver albumin than in serum albumin. Albumin content of the blood serum and liver extracts decreases at later ontogenetic stages (in 180- and 720-day animals), which is presumably associated with the decrease in synthesis of this protein by the liver. The molecular weight of the albumin remains constant in all age groups being typical for serum albumin of vertebrates.