[Fibrinolytic activity of bacteria from Pseudomonas genus].

A strain of the genera Pseudomonas genera was found to possess hemolytic, fibrinolytic and thrombolytic activities. The fibrinolytic activity of the lyophilized unpurified preparation was 900 conventional units/mg. After incubation in the blood plasma, the activity completely remained.

[Activity of endopolygalacturonase in culture fluid of experimentally prepared polyploid cultures of Saccharomyces vini].

The action of colchicine solutions on a diploid Saccharomyces vini culture used in viniculture yielded three polyploid strains. The strains differ from the parent culture in their cell morphology and a higher endopolygalacturonase activity.

[The esterase activity of a pigmented bacterial group belonging to the Pseudomonas genus].

Bacteria belonging to the Pseudomonas genus and isolated from zonal soils in different geographical zones of the USSR as well as from the rhizosphere of cultivated and wild plants were tested for their esterase activity. The studied collection of cultures included 205 strains of different pigmented Pseudomonas species which, according to the conventional taxonomy, were assigned to the so-called "Pseudomonas fluorescens complex". As was shown in this study, many Pseudomonas species are potential producers of nonspecific esterases.

[Effect of inhibitors and cations on the proteolytic activity of Bacillus mesentericus].

The effect of some inhibitors and bivalent metal cations (Mn2+, Ca2+, Fe2+, Zn2+, Mg2+, Co2+ and Cu2+) on the proteolytic activity of two Bacillus mesentericus strains (strain 8 and strain 64 M-variant) was comparatively studied. The both enzymes were shown to be serine proteinases, but the proteinase of strain 64 was also a metal-dependent enzyme. Metal ions exerted no essential effect on the proteinase of strain 8.

[Fibrinolytic activity of natural variants of Bacillus mesentericus].

The natural variability of the ability to synthesize proteinases by Bacillus mesentericus 64 was studied. The population of this strain was shown to be heterogeneous. Three types of variants (S, M and P) differed in the morphology of their colonies and in the culture characteristics from the typical colonies of the parent strain.