The Hbp1 and Hbp2 proteins interact with hemoglobin.
A, the results of an ELISA experiment showing binding of Hbp1, IsdHN2, and to a lesser extent Hbp2 to Hb-coated wells. B, the results of an ELISA experiment showing binding of Hbp2N1, Hbp2N3, IsdHN2, and to a lesser extent Hbp2N2 to Hb-coated wells. Error bars represent S.D. from three experiments.