in injected oocytes , nmda application evoked a partially desensitizing inward current that was potentiated by glycine , blocked by the competitive antagonist d-2-amino-5-phosphonovaleric acid , blocked by mg2+ and by zn2+ , and blocked in a use-dependent manner by the pcp receptor ligands pcp and mk-801 .
C0017890
glycine
C0002520
amino