Fig. 4.

(A) Schematic representation of typical experiments showing western blot analysis of neutravidin agarose precipitates of cell surface biotinylated, efficiently cleaved, Env proteins with controls as shown, (B) schematic representation of typical experiments showing western blot analysis of immunoprecipitates of efficiently cleaved Env proteins from isolated plasma membrane fractions with cleavage non-specific bNAb VRC01 and controls as shown.