Fig. 9. Interactions between ElB, Noc and Groucho proteins. GST pull-down experiments were carried out, using GST fusions of ElB constructs, Noc, or an unrelated human 60 kDa protein. The scheme shows the fragments of ElB and Noc used for GST fusion. Domains are marked by the same color code as Fig. 3A. In vitro translated, labeled ElB, Noc or Groucho proteins were incubated with the GST constructs. ElB can associate with itself, with Noc and with Groucho.