3,3'-Diaminobenzidine
'3,3'-Diaminobenzidine (DAB) is a chemical compound used in histology and immunohistochemistry as a chromogen for the visualization of an antigen-antibody reaction, where it forms an insoluble brown precipitate at the site of the reaction, facilitating microscopic analysis.
Benzidines
Aminobiphenyl Compounds
Peroxidases
Histocytochemistry
Cyanides
Horseradish Peroxidase
Staining and Labeling
Microscopy, Electron
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
Organoids
An organization of cells into an organ-like structure. Organoids can be generated in culture. They are also found in certain neoplasms.