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. 2016 Sep 19;44(20):9821–9830. doi: 10.1093/nar/gkw807

Figure 2.

Figure 2.

AtPOT1aOB1 specifically binds telomeric DNA. (A) EMSA assay results for POT1aOB1-(TTTAGGG)5 binding. 5′ labeled (TTTAGGG)5 was titrated with increasing POT1aOB1 (0-820 nM). (B) The Kd (app) of POT1aOB1 for (TTTAGGG)5 was determined as described in Materials and Methods using data from Figure 2A. (C) EMSA based competition assay results for POT1aOB1-(TTTAGGG)5 using a fixed POT1aOB1 concentration (∼500 nM) and 50 to 100-fold excess of the nucleic acids specified. NS DNA stands for non-specific DNA (5′-TTAATTAACCCGGGGATCCGGCTTGATCAACGAATGATCC-3′ (ref. 32)). (D) Results of EMSA based displacement assay using ∼500 nM POT1aOB1 in the absence and presence of 100- to 200-fold excess of different oligonucleotides to assess the specificity of POT1aOB1 binding.