Fig 2. Neutralization by CH235 UCA2 predicts graded binding to corresponding SOSIP trimers.
(A) Overall strategy to identify and characterize engineered CH505TF Envs that engage CH235 UCA2. (B) Neutralization of parental and mutant CH505TF Env-pseudotyped viruses produced in either 293T or 293S GnTI- cells and assayed with CH235 UCA2 in TZM-bl cells. Shown are representative curves from S1H Fig. (C) SPR binding of CH235 UCA2 to parental and mutant CH505TF SOSIP trimers produced in either Freestyle293 (293F) or 293S GnT1- cells. The apparent dissociation rate constant (KD) values are an average of two measurements (see S3 Fig). NB, no binding.