Recognition of domain-deleted mutants by anti-β₂GPI antibodies coated to different plates. Typical recognition of domain-deleted mutants of β₂GPI and full-length β₂GPI coated onto hydrophilic or hydrophobic ELISA plates by a sample from a patient with type A (left) and type B (right) reactivity. ODs are displayed after subtraction of the OD obtained by pooled normal plasma. Error bars represent mean ± SEM of triplicate points.