inhibition of gaba transaminase which led to a several-fold increase of gaba levels in the goldfish optic tectum or diazepam pre-treatment , were unable to protect tectal neurons from kainic acid neurotoxicity , as judged by light and electron microscopic observations and by the drop of marker enzymes for neurotransmitters .
C0228405
optic tectum
C0039433
tectal