Table 1: Free energy for ATP hydrolysis in various organisms and under different physiological conditions. Inferred ΔG' calculations based on a value of ΔG'0 of -37.6 kJ/mol. This makes the table values consistent among themselves but creates small deviations from the ΔG' values reported in the primary sources. Such deviations can result from variations in ionic strength, pH and measurement methods biases. Values are rounded to one or two significant digits. In spinach, where Pi concentration was not reported, a characteristic value of 10 mM was used (BNID 103984, 103983, 111358, 105540).