On the second portonation of adenine and guanine.
D000225:Adenine; D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D006147:Guanine; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D008433:Mathematics; D008968:Molecular Conformation; D012044:Regression Analysis; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013464:Sulfuric Acids
D013464:Sulfuric Acids; D006147:Guanine; D000225:Adenine