Fig. 4From: Human monoclonal anti-protective antigen antibody for the low-dose post-exposure prophylaxis and treatment of AnthraxAffinity and kinetics assay. PA21 affinity and kinetics assays showed five curves with different concentrations of anti-PA IgG ranging from 5 nmol/L to 80 nmol/L; Kd = 1.0003 × 10–9 M with PA83 at 25 μg/mLBack to article page