title: Histochemical azo coupling of protein histidine. Brunswik's nitration method.
mesh_terms: D000085:Acetates; D000818:Animals; D001391:Azo Compounds; D006639:Histidine; D006651:Histocytochemistry; D008722:Methods; D009566:Nitrates; D011506:Proteins; D051381:Rats; D013194:Staining and Labeling; D014364:Tryptophan; D014443:Tyrosine
chemical_list: D000085:Acetates; D001391:Azo Compounds; D009566:Nitrates; D011506:Proteins; D014443:Tyrosine; D006639:Histidine; D014364:Tryptophan