| Â | [UCB] | Exptl. | Â | Â | Calculated |
|---|
pH | μ M | 103θ†| fsHB-‡ | fsB= ‡ | 103θ†|
|---|
7.23
| 34.0 | -11.80 | 0.1661 | 0.5790 | -13.42 |
7.35
| 4.6 | -12.60 | 0.1474 | 0.6780 | -11.06 |
8.13
| 4.6 | 0.69 | 0.0345 | 0.9550 | 1.50 |
8.15
| 34.0 | 1.90 | 0.0330 | 0.9570 | 1.66 |
9.12
| 4.6 | 5.10 | 0.0037 | 0.9946 | 4.75 |
9.35
| 34.0 | 5.38 | 0.00217 | 0.9962 | 4.91 |
11.60
| 34.0 | 5.50 | 0.000012 | 0.9986 | 5.13 |
- * Data from D'Alagni M, et al., 1994 [15]. For experimental problems, see Additional file 3, Table S3.
- †103θ values obtained with 4.6 μ M UCB have been multiplied by a factor, 34/4.6, to render them comparable with 103θ values obtained at 34 μ M UCB.
- ‡ fsHB- and fsB=, fractions of total UCB bound to TC as monoanion and dianion respectively, calculated utilizing the partition ratios of each UCB species in water [4] and 50 mM TC [21], plus fitted 103θ values for bound HB- and B=, derived from modeling the experimental changes in 103θ with pH, as described in the text.
