title: A method for histochemical demonstration of protein-bound amino groups by light microscopy.
abstract: We have established an efficient method for the histochemical demonstration of protein-bound amino groups by light microscopy, using a ninhydrin or alloxan-thiocarbohydrazide-silver proteinate (NHY or ALX-TCH-SP) sequence followed by a physical development (PD) procedure. As a result of the present experimental studies on Carnoy's solution-fixed paraffin sections of a series of rat tissues, including three types of major salivary glands, liver, pancreas, stomach, duodenum, jejunum, colon, kidney, prostate, and spleen, the sensitivity and specificity of the new method were found to be sufficient. In the tissues tested, protein-bound amino groups were visualized by distinct brownish or blackish reaction products. Comparisons of the particular method with the NHY or ALX-Schiff methods employed hitherto have substantiated the fact that the former method leads to apparently higher visibility of reaction products than the latter.
authors.affiliation: Department of Anatomy, Nagoya City University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yamada
authors.forename: Y
authors.initials: Y
authors.lastname: Abe
authors.forename: O
authors.initials: O
authors.lastname: Fujimori
mesh_terms: D000496:Alloxan; D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D004064:Digestive System / Q000166:cytology / Q000378:metabolism; D005837:Genitalia, Male / Q000166:cytology / Q000378:metabolism; D006651:Histocytochemistry / Q000379:methods*; D006834:Hydrazines; D008208:Lymphatic System / Q000166:cytology / Q000378:metabolism; D008297:Male; D009555:Ninhydrin; D011506:Proteins / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D012836:Silver Proteins; D014357:Trypsin; D014551:Urinary Tract / Q000166:cytology / Q000378:metabolism
chemical_list: D000596:Amino Acids; D006834:Hydrazines; D011506:Proteins; D012836:Silver Proteins; C011368:thiocarbohydrazide; D000496:Alloxan; D014357:Trypsin; D009555:Ninhydrin