[Characteristics of the activation of type E. Cl. botulinum toxins].

Molecular changes occurring in type E. Cl. botulinum single-chain toxin as the result of treatment with trypsin under different conditions were studied.

[Isolation and properties of a highly purified Clostridium botulinum type F toxin].

A scheme for isolation of highly purified type F Cl. botulinum toxin has been developed. The scheme allows one to obtain the toxin with specific activity of 1.

[Isolation and properties of highly purified C1. botulinum toxin type E].

A new method of isolation of highly purified Cl. botulinum toxin of E type from the cultural fluid of strain 188 centrifugates was developed. The method allows to isolate the toxin both in a precursor and in activated forms with a yield of 10--15%.

[Patterns in the formation of proteolytic enzymes by different strains of C1. botulinum type F].

The authors studied regularities attending the accumulation of proteolytic enzyme and toxin by C1. botulinum, type F, strains in the medium. Strains No.