Enhanced binding of Mab45 to NiV-G (G) induced by ephrinB2 (B2) receptor
binding. A, polyclonal (806) and monoclonal
(Mab26 and Mab45) anti-NiV-G antibodies binding to
full-length NiV-G expressed in CHOpgsA745 (CHO) cells in the presence or
absence of soluble B2 protein at room temperature (∼20 °C) as detected
by flow cytometry. % normalized binding indicates MFI values normalized to the
MFI values obtained in the absence of soluble B2 (set at 100% for each
antibody examined). Average ± S.E. are shown, n = 3.
B, similar experiment to A, except performed at 4 °C.
C, binding of Mab45 to CHO cells expressing G or mutant E533Q at 37
°C when increasing concentrations of soluble ephrinB1 (B1),
ephrinB2 (B2), or ephrinB3 (B3) were used. Logarithm of the
molar concentration of the soluble ephrinBs used was plotted against %
normalized binding, calculated as in A. Average ± S.E. are
shown, n = 4. D, the inhibitory properties of 806, Mab26, or
Mab45 antibodies were measured by mixing the indicated concentrations with
NiV/vesicular stomatitis virus renilla luciferase pseudotyped particles
immediately before infection of Vero cells. Data are shown as % inhibition
normalized to luciferase activity in the absence of any antibodies. Average
± S.E. are shown; n = 3.