PSMB6 and type 1 diabetes mellitus: Specifically, the frequency of the G allele of PSMA6 rs1048990 SNP was 18.4% in patients with T1DM and 17.1% in controls (p = 0.423), while the T allele of PSMB6 rs2304975 SNP was detected in 7.8% of cases and 8.0% of controls (p = 0.850).