... constant, k, of a catalysed reaction, and the pK of the catalyst:logk = c + bpK, where b and c are constants and the value of b pro-vides a measure of the balance between nucleophilic and general base ... series of reactions involved inthe formation of, and mediation of the action of second messengers,e.g. in the activation of glycogen phosphorylase; (3) the process of ac-tivation of steroidogenesis ... combined state, and is a mixture of stable nuclides of relative mass 40 (96.97 atompercent) and 44 (2.06 atom percent) with small proportions of nu-clides of relative mass 43, 46, and 48. Calcium...