Homogeneity of HSP gp96. The homogeneity of the HSP gp96 purified from a human EBV-transformed B-cell line was tested for all preparations by SDS gel electrophoresis, followed by silver staining (lane 1 - standard; lane 2 - gp96). The identity of the gp96 was analyzed by immunoblotting with a monoclonal anti-gp96 antibody (lane 3).