Inhibition ELISA. Binding of MAb5.2 (A), anti-MSP-1 antibody from rabbit K103 (B), and anti-MSP-1 antibody from rabbit K104 (C) to coated rMSP-119 was studied in the presence of soluble rMSP-119 (⧫) or Bmp42 (•) as the inhibitor. The following concentrations of antibody and antisera were used: MAb5.2, 0.15 μg/ml; K103, 1/12,500; and K104, 1/25,000.