Molecule FcRn Kd (nM) at pH 6* FcRn Kd (nM) at pH 7.4* Percent Bound at pH 7.4^
BsAb-1 105 ± 15 No binding 53.8 ± 9.8
BsAb-2 115 ± 25 No binding 4.6 ± 0.2