Range: ±0.05 see comments
||Smith, R. M., A. E. Martell, et al. (1991). Critical-evaluation of stability-constants for nucleotide complexes with protons and metal-ions and the accompanying enthalpy changes. Pure And Applied Chemistry 63(7): 1015-1080. p.1075 table 5
||log K, 37 degreesC, 0.15 M Na+. These are concentration constants using hydrogen ion concentration. Mixed constants may be obtained from these values by using an activity coefficent of 0.78 which increases them by 0.11 units.