Merck, MAB2263, Anti-GluR1-NT (NT) Antibody, clone RH95

Glutamate receptors (GluRs) are a diverse group responsible for mediating most of the excitatory synaptic transmission in the CNS of vertebrates. They can be categorized as ionotropic or metabotropic and subcategorized by their agonist preferences (NMDA, AMPA or Kainic acid). There are four types of AMPA selective GluR subunits (GluR1, GluR2, GluR3 and GluR4). Tetrameric or pentameric combinations of different subunits contributes to the functional diversity of AMPA receptors. AMPA receptors mediate fast synaptic current at most excitatory synapses, with stoichiometry characterized by subtype composition. The critical residue controlling calcium permeability is in the pore loop region. In GluR1, GluR3, and GluR4, this position is occupied by a Gln residue. The insertion or removal of GluR1/GluR4 oligomeric channels from postsynaptic membranes appears to be LTP/LTD activity dependent while GluR2/GluR3 oligomers are continuously cycling.