- glutamate receptor, ionotropic, NMDA2B (epsilon 2) GluRepsilon2 Nmdar2b NMDAR2B|Nmdar2b|GluN2B|GluRepsilon2|NR2B GluN2B Grin2b NMDAR2B O MGI:95821 http://identifiers.org/mgd/MGI:95821 genetic mapping protein coding gene NR2B Gene