[Isoelectric spectra of liver tissue and blood serum albumin for rabbits of different age]. / Izoelektricheskie spektry al'bumina tkani pecheni i syvorotki krovi krolikov raznogo vozrasta.

The isoelectric spectrum of albumin isolated from the liver and blood serum of 30-, 45- and 90-day rabbits was studied. By the method of isoelectric focusing in the boron-borate buffer--mannitol system. It is shown that the liver albumin displays heterogeneity ans is separated into four-five fractions, with pJ 4.8-6.0. Age peculiarities are found for the isoelectric spectrum of this protein. The serum albumin spectrum for rabbits of the studied age groups is characterized by the presence of a homogeneous peak with pJ 5.59, 5.57 and 5.47 corresponding to 30, 45 and 90-day age, respectively. Identity of serum albumin and protein of some liver albumin spectrum components is established by analyzing the pattern of the isoelectric spectrum for a mixture of preparations of 90-day rabbit proteins under comparison.

[Amino acid composition of chicken serum albumin]. / Osobennosti aminokislotnogo sostava syvorotochnogo al'bumina u kur.

Studies have been made on the amino acid composition of electrophoretically homogeneous albumin and its main isoelectrically homogeneous fraction in two strains of hens and their hybrid. Serum albumin of hen and hybrid is characterized by higher total content of Asp and Glu residues as compared with that of the cock (137, 121, and 116 respectively) and lower content of Lys (59 against 66). The acidity of albumin increases in the line cock-hen-hybrid. With respect to its amino acid composition, the maternal serum albumin stands close to the hybrid one.