Fig. 20From: Thermal decomposition of the amino acids glycine, cysteine, aspartic acid, asparagine, glutamic acid, glutamine, arginine and histidineInterpretation of Histidine data. Final residue of His, C6H9N3O, 139 Da, consisting of two 5-rings: 2-amino-2,4-cyclopentadien-1-one (C5H5NO, chemspider 28719770) and imidazoleBack to article page