[Anticoagulant activity of arabinogalactane sulfate and cedar bark extract studied in vitro].

We have studied in vitro the ability of the Siberian cedar crust (SCC) extract (Pinus sibirica Du Tour) and arabinogalactan sulphate (AGS) extracted from wood of Siberiam pine-tree (Larix sibirica Ledeb.) to increase the human blood plasma coagulation time and also to inhibit the amydolytic activity of thrombin (aIIa) and the coagulation factor Xa (aXa). A method has been developed by means of which SCC increases the aXa activity by a factor of 3.

[L-arabinose control of the formation of heliomycin complex synthesized by Streptomyces olivocinereus].

The unfavourable effect of arabinose on biosynthesis of heliomycin resembled by its outer appearance the "glucose effect", a well known phenomenon relevant to glucose inhibition of the synthesis of catabolic enzymes of other sugars. Arabinose inhibited glycerol utilization by the cells of S. olivocinereus preadapted to it.

[Phosphorylation of phospholamban in experimental myocardial infarction and proteolysis stabilization during phosphorylation].

The cAMP-dependent phosphorylation of proteins of both non-fractionated microsomes of the dog myocardium and phospholamban were studied in experimental myocardial infarction. In the presence of cAMP and exogenous protein kinase, the incorporation of 33P into microsomes and phospholamban of the affected muscle decreased as compared to that in the intact heart muscle. During infarction, partial degradation of phospholamban was observed.