title: Potentiometric titration and conformational change in pepsinogen.
mesh_terms: D002021:Buffers; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004792:Enzyme Precursors; D006639:Histidine; D006863:Hydrogen-Ion Concentration; D008970:Molecular Weight; D010434:Pepsin A; D011199:Potentiometry; D013696:Temperature; D013816:Thermodynamics
chemical_list: D002021:Buffers; D004792:Enzyme Precursors; D006639:Histidine; D010434:Pepsin A