deltaGprimeO

Definition: For biochemical reactions, this property refers to the standard transformed Gibbs energy change for a reaction written in terms of biochemical reactants (sums of species), delta-G'^o. delta-G'^o = -RT lnK' and delta-G'^o = delta-H'^o - T delta-S'^o delta-G'^o has units of kJ/mol. Like K', it is a function of temperature (T), ionic strength (I), pH, and pMg (pMg = -log₁₀[Mg²⁺]). Therefore, these quantities must be specified, and values for DELTA-G for biochemical reactions are represented as 5-tuples of the form (delta-G'^o T I pH pMg). This property may have multiple values, representing different measurements for delta-G'^o obtained under the different experimental conditions listed in the 5-tuple. (This definition from EcoCyc)

Source:http://www.biopax.org/release/biopax-level2.owl#deltaGprimeO