[RNAase activity in pig embryo kidney culture during interferon formation]

In production by pig embryo kidney cell (PEK) culture of interferon induced by UV-irradiated Newcastle disease virus, T strain, an increase in the activity of intracellular RNA-ase is observed at the optimal pH 8.5. RNA-ases of experimental cell extract have exonuclease activity in contrast to control cell enzymes which show endo- and exonuclease activity. A thermolable inhibitor absent in control cells was detected in experimental PEK cells.