Subsequently, we conducted a correlational analysis between six glycan structures (specifically binding to PHA-L, SNA, PSA, SBA, RCA120, and AAL) and five disease-related indicators (BP180 antibody titers, BP230 antibody titers, BPDAI score, mucosal score, and erythema score, detailed data information refer to Supplementary Table 8). Here, COL17A1 is linked to Erythema.