[Extracellular alkaline ribonucleases produced by Bacilli strains from the permafrost of the Kolyma lowland]

Aerobic spore-forming bacteria were isolated from the permafrost of the Kolyma lowland. Two strains of bacilli are shown to produce a relatively large amount of extracellular low-molecular weight alkaline RNases. The N-terminal amino acid sequences of the RNases secreted by these strains are similar. This suggests that the protein sequences of the RNases of Bacillus species have been conserved in the course of evolution.