title: Difference infrared spectrophotometric titration of protein carboxyls.
mesh_terms: D002264:Carboxylic Acids / Q000032:analysis; D003903:Deuterium; D004798:Enzymes / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D008433:Mathematics; D008722:Methods; D009113:Muramidase / Q000032:analysis; D013055:Spectrophotometry, Infrared; D013696:Temperature; D013816:Thermodynamics
chemical_list: D002264:Carboxylic Acids; D004798:Enzymes; D003903:Deuterium; D009113:Muramidase