FUT9 and schizophrenia: Our findings are particularly striking given the recent identification of FUT9 as a gene locus linked to schizophrenia.33 Abnormal glycosylation of the antennary fucose-bearing proteins EAAT2/GLT-181 and GABAA receptor subunits (Tables S3 and S7)82 has been described in schizophrenia post-mortem brain studies.