Figure 8.

ss oligonucleotide-binding assay. Radioactive-labeled ss oligonucleotides were used as probes in reactions as described for Figures 6 and 7. Triangles represent excess amounts (5-, 50-, and 500-fold) of competitor ss oligonucleotides, and squares represent single-concentration (500-fold excess) competition reactions. The shifted bands are indicated by arrows, the free probes by arrowheads, and the cold competitors used above the gels. SSC1, SSC2, and SSC3 are single-strand nucleotides that lack telomere-related sequences. Competition was observed with all four competitors in reactions with probes from either strand.