Summary
A method is described for the histochemical demonstration of γ-glutamyl transpeptidase in tissue sections embedded in glycol methacrylate at low temperature. Enzyme activity was preserved by a short (3 h) fixation of tissue in 4% paraformaldehyde at 4° C prior to embedding at 4° C. Tissue embedded in glycol methacrylate combined good morphology with accurate enzyme localization. Blocks of the embedded tissue could be stored at room temperature for at least 3 months without loss of enzyme activity. The resin is non-fluorescent, allowing the use of the fluorescent coupling agent 5-nitrosalicylaldehyde to visualize the reaction product.
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Murray, G.I., Burke, M.D. & Ewen, S.W.B. γ-Glutamyl transpeptidase demonstrated in tissue sections embedded in glycol methacrylate resin. Histochem J 19, 476–482 (1987). https://doi.org/10.1007/BF01675417
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DOI: https://doi.org/10.1007/BF01675417