We found evidence of a shared causal T1D risk variant with pQTLs for 5 proteins: CTRB1 (PP4 99.7%), CPA1 (PP4 99.7%; trans-pQTL), PNLIPRP1 (PP4 99.6%; trans-pQTL), APOBR (PP4 92.1%), and IL7R (PP4 68.8%) (Fig. 2). Here, CPA1 is linked to type 1 diabetes mellitus.