SLC6A1 and schizophrenia: Here, we present data on the functional impact on GABA uptake of 213 SLC6A1 variants, 185 of which have not previously been characterized,10,11,12,13,14 including variants associated with schizophrenia, the majority of recurrent variants, and “control” variants that are synonymous, common, or documented as benign in ClinVar.