Of particular interest to astronomers is the nebula's faint, Venn-diagram-like structure — two rings of ejected material shaped by the gravitational influence of the central stars. Scientists ...

Figure 1: Fragments of Mre11 and Ku70 proteins used in two-hybrid analyses. Figure 3: Characterization of antibodies and analysis of immune precipitates by western blot. Figure 5: Role of Mre11 ...