PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9106453-4 1997 In contrast, the present experiments demonstrated that in calcium-free solution (magnesium replacement) zinc can potentiate both GluR3, as expected, but also GluR1. Magnesium 81-90 glutamate receptor, ionotropic, AMPA 3 L homeolog Xenopus laevis 129-134