Antigen restriction and IgG subclasses among anti-GBM autoantibodies
Thirty-seven sera positive for anti-GBM antibodies (antibodies against the ‘Goodpasture antigen’ = NCI-domain of collagen IV) in routine analysis were studied for antigen restriction and IgG subclasses. Four different polypeptides, the four α-chains (α1, α2, α3 and α4) of human collagen IV NCI, were used as coating in ELISA assays. Autoantibodies were detected with monoclonal antibodies towards hu
