DS-1 and Wa have different sensitivities to defensins. DS-1 (open symbols) and Wa (filled symbols) were incubated with the indicated concentrations of (A) RED1, (B) RED3, (C) RMAD1, (D) RMAD4, (E) HD5, (F) HNP1, or (G) Crp2 before infecting MA104 cells (protocol 1). Data are normalized to infection in the absence of defensin (control infection) and are the mean ± SD of at least three individual experiments.