Abstract
Summary
Induction of adaptive enzyme synthesis is described in a phytoflagellate. The adaptation has been shown to occur in non-proliferating cell suspensions, and it is also shown to be dependent upon an exogenous source of nitrogen. The adaptive enzyme synthesis is selectively inhibited by ultraviolet irradiation without affecting the activity of pre-existing enzymes. At low ultraviolet intensities viability and adaptability have been partially dissociated; adaptation is only slightly inhibited while viability is reduced by 80%.
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