Incorporation of 14C-leucine into acid-insoluble material and tRNAleu from light stimulated rat brain.

Rats kept in the dark (i.e., less than 0.1 lux) from birth until 15 days were exposed to light. In vivo incorporation of 14C-leucine into acid insoluble material and in vitro aminoacylation of tRNAleu were studied in visual, somaesthetic and motor brain cortices. A significant increase of both 14C-leucine incorporation into acid insoluble material and tRNAleu aminoacylation with respect to the controls were found only in the visual cortex of light stimulated animals.