[Thermostability of protein structure in the native state and mechanisms of its maintenance].

A comparison of temperature changes of the protein spectra with temperature behavior of other systems with hydrogen bonds shows high thermostability of the functional active structure of protein molecules. The stability of proteins space organization is regulated and supported by non-monotonous temperature changes of this organization. The physical mechanism of thermostabilization includes interaction of hydrophobic radicals of protein with the aqueous environment.

[Molecular profile of the aminopherases of rat heart cytostructures induced by toxic doses of thyroxine].

The development of thyrotoxin intoxication is attended by a sharply increased activity of aminopherases localized in the nuclei, mitochondria and hyaloplasm. The molecular pattern of the study enzymes undergoes a substantial change and is supplemented with new isoforms in the cathod portion of the spectrum embracing the alanine-aminotranspherase of the nuclei and hyaloplasm, and that of the aspartate-aminotranspherase of the nuclei and mitochondria. Actinomycin D, an inhibitor of transcription, abolishes the effect of thyrotoxin stimulating the aminopherase activity and induction of the hormones of new molecular forms of the aminopherases.