PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7679115-4 1993 Expression in Xenopus oocytes demonstrated that the single protein encoded by the cloned cDNA possesses the electrophysiological and pharmacological properties characteristic of the NMDA receptor, including Ca2+ permeability, voltage-dependent Mg2+ block, and inhibition by selective antagonists such as Zn2+ and channel blockers. Zinc 304-308 glutamate ionotropic receptor NMDA type subunit 1 L homeolog Xenopus laevis 182-195