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Abstract
In native brain membranes the principal excitatory neurotransmitter L-glutamate activates
cation-conducting channels with distinct biophysical and pharmacological properties.
Molecular cloning has revealed the existence of 16 channel subunits that can assemble
in homomeric or heteromeric configurations in vitro to form receptor channels with
disparate functional properties. This review describes the different channel types
obtained by recombinant means and the genetic mechanisms controlling the expression
of functionally important channel structures.