Oligodeoxynucleotides (ODN) 1a (20-mer, 5'-TCA TTG CTG CTT AGA CCG CT-3'), 1b (21-mer, 5'-TTG CCA TGA TTG ACA ACC AAT-3') and 1c (32-mer, 5'-TAG TTT TAT AAT TTC ATC AGC AGT GTT ACC GT-3') were either obtained from a commercial source or synthesized on a MerMade-6 DNA/RNA synthesizer at 1 (1a) or 0.2 (1b-c) µmol scale under standard synthesis, cleavage and deprotection conditions. RP HPLC was carried out under typical conditions described elsewhere. UV absorbance was obtained on a Horiba Scientific Duetta Fluorescence and Absorbance Spectrometer at 260 nm in a 1 mL quartz cuvette with a 1 cm light path. Water was used as the blank. UV absorbance was also obtained using a ThermoScientific NanoDrop 1000 Spectrophotometer at the same wavelength with water as the blank; the data are equivalent to those obtained using a spectrometer with a conventional 1 cm light path. 1 Measured with a UV-Vis spectrometer. The fractions from the corresponding HPLC peak were combined and evaporated to dryness. The ODN was dissolved in 1 mL of water and the UV absorption was measured using a 1 mL cuvette with 1 cm light path. Measured with a NanoDrop spectrometer using 2 µL of the same sample that was used for the measurement with the UV-Vis spectrometer.