In this study we report association studies of schizophrenia with total 21 SNPs distributed in genes SLC1A4, SLC1A5, SLC6A5 and SLC6A9 that encoding the neutral amino acid transporters ASCT1, ASCT2 and the glycine transporters GLYT2, GLYT1, respectively. Here, SLC1A5 is linked to schizophrenia.