FIG. 4.

Binding of HR2b-B to the HN protein membane-proximal sequence with overlapping deletions. Blots similar to those shown in Fig. 2C were incubated with HR2b-B, and binding was quantitated as described in the legends to Fig. 2 and 3. (A) Results of binding to the HN protein membrane-proximal sequence with overlapping deletions of the carboxyl-terminal region compared to binding to a GST fusion protein containing the entire membrane-proximal sequence (GST-AB). (B) Results of binding to the membrane-proximal sequence with overlapping deletions of the amino terminus compared to binding to a GST fusion protein containing the entire membrane-proximal sequence (GST-AB). Identical results were obtained in three separate experiments.