1.14.13.23 3-hydroxybenzoate + NADH + O2 - 1.14.13.23 3-hydroxybenzoate + NADH + O2 initial step of the degradation in the meta-cleavage pathway leading to tricarboxylic acid cycle intermediates, MobR negatively regulates the expression of mobA, the repression is relieved by binding of 3-hydroxybenzoate 1.14.13.23 3-hydroxybenzoate + NADPH + H+ + O2 - 1.14.13.23 3-hydroxybenzoate + [reduced NADPH-hemoprotein reductase] + O2 - 1.14.13.23 4-hydroxybenzoate + NADPH + H+ + O2 low activity