[Comparison of the action of powerful pulses of ultrashort UV on the DNA replication and transcription functions in proliferating and resting HeLa cells].

It was established that the response of proliferating and resting HeLa cells to irradiation with single powerful UV-pulses (lambda = 266 nm, the pulse duration 3.10(-11) sec) is different. In the proliferating cells, the rate of DNA synthesis is markedly changed (accelerated or retarded) while the rate of RNA synthesis changes slightly. In the resting cells, RNA synthesis is stimulated while DNA synthesis remains at the control level. In all cases, the processes observed depend upon the intensity and the number of pulses.