CRYSTAL STRUCTURE OF THE NR3B LIGAND BINDING CORE COMPLEX WITH GLYCINE AT 1.58 ANGSTROM RESOLUTION 2RCA MEMBRANE PROTEIN, CALCIUM, CELL JUNCTION, COILED COIL, GLYCOPROTEIN, ION TRANSPORT, IONIC CHANNEL, MAGNESIUM, POSTSYNAPTIC CELL MEMBRANE, RECEPTOR, SYNAPSE, TRANSMEMBRANE, TRANSPORT