Fig. 1

Reactivity of human monoclonal anti-beta2 glycoprotein I (aß2GPI) antibodies MBB2 (a) and HCAL (b) with phospholipids (PL) and PL-binding proteins by line immunoassay (LIA): MBB2 (0.1 mg/L) and HCAL (0.02 mg/L) were run in the LIA alone or together with serum, ß2GPI, blood donor serum, and bovine serum albumin (BSA). As the positive reaction control a mixture of human IgG and IgM was immobilized. a 1, 0.1 mg/L aß2GPI MBB2; 2, 0.1 mg/L aß2GPI MBB2 + 10 mg/L ß2GPI; 3, 0.1 mg/L aß2GPI MBB2 + 10 mg/L BSA; 4, 0.1 mg/L aß2GPI MBB2 + 30 μL serum (1/33); and 5, 30 μL serum (1/33). b 1, 0.02 mg/L aß2GPI HCAL; 2, 0.02 mg/L aß2GPI HCAL + 10 mg/L ß2GPI; 3, 0.02 mg/L aß2GPI HCAL + 10 mg/L BSA; 4, 0.02 mg/L aß2GPI HCAL + 30 μL serum (1/33); and 5, 30 μL serum (1/33)