Fig. 1From: Association between polymorphisms in the GRIN1 gene 5′ regulatory region and schizophrenia in a northern Han Chinese population and haplotype effects on protein expression in vitroSchematic diagram of the distribution of seven SNP loci in the GRIN1 gene. The detailed position of the fragment used for Sanger DNA sequencing in the GRIN1 gene 5′ promoter region was located between − 2334 bp and + 86 bp. * denotes the SNP not included in the genetic association study because the minimum allele frequency was less than 0.01Back to article page