label: Anti-LABD97 antibody positivity
label_lc: anti-labd97 antibody positivity
description: "The presence of autoantibodies (immunoglobulins) in the serum that react against LABD97, which is structurally identical to a portion of the extracellular domain of BPAg2. BPAg2, a 180 kDa bullous pemphigoid antigen, is a transmembrane protein important for basement membrane cohesion."