[Stability of synthesis of type-II restriction endonucleases by streptomyces strains after their long-term storage].


Three streptomycete strains (Streptomnyces sp. 14, Streptomnzyces sp. 34, Streptomyces sp. 48)--producers of isoschisomers of restrictase Asull (Ssp34, Ssp48, Ssp14) were studied for the presence of synthesis of those site-specific endonucleases after long-term storage. Mycelium of streptomycete cultures was preserved at a temperature of -18 degrees C in 70… (More)