1.
Braz. j. med. biol. res
; 23(12): 1263-6, 1990. ilus, tab
Article
in English
| LILACS
| ID: lil-103654
ABSTRACT
Liquid holing recovery (LHR) consist of an increase in the survival of UV-irradiated cells when they ar held under non-nutrient conditions before palting. In this study we investigated in E. coli B cells the effect of the growth inhibition induced by near UV (365 nm) illumination (growth delay, GD) before irradiation with UV-254 nm on the amplitude of LHR and the induction of an SOS function (filamentation) during the liquid holding period. Our results demonstrated that pre-illumination with near-UV inhibitis LHR and the induction of filamentation when the cells are incubated in nutrient medium. Moreover, this inhibition is due to GD, an effect caused by a photoproduct in the E. coli t-RNA, the 8-13 link