FIG. 5.

Replacement of minor domain B with the SV41 F counterpart increases the specificity of M(1+2) for the SV41 HN protein. (A) Schematic diagram of chimeric F proteins. (B) Western blotting of chimeric F proteins was performed as described in the legend to Fig. 3B. (C) Cell surface expression levels and fusion activity of the chimeric F proteins were quantified as described in the legend to Fig. 3C, except that the cell surface expression levels were normalized by the value given by M(1+2).