title: [Quantitative histochemical investigations on the demonstration of soluble and membrane bound acetylcholinesterase in the optic tectum of the rudd (Scardinius erythrophthalmus)].
abstract: With the aid of the method of Karnovsky and Roots (1964) which was adapted to the semi-permeable membrane technique and a scanning recording method the relative activity of soluble and membrane bound AChE as well as the influence of fixation with 5% paraformaldehyde on the enzyme activity was investigated quantitative-histochemically in the tectum opticum of the rudd. Approximately 38% of the AChE activity which can be demonstrated in the whole tectum opticum on native untreated cryostat sections are puffer-soluble and only 68% are detectable after fixation. The influence of both puffer and fixation pretreatment is different in the several layers of this brain structure.
mesh_terms: D000110:Acetylcholinesterase / Q000378:metabolism*; D000818:Animals; D002462:Cell Membrane / Q000201:enzymology; D003600:Cytosol / Q000201:enzymology; D005399:Fishes; D006651:Histocytochemistry; D013477:Superior Colliculi / Q000166:cytology / Q000201:enzymology*
chemical_list: D000110:Acetylcholinesterase
vernacular_title: Quantitativ-histochemische Untersuchungen zur Darstellbarkeit löslicher und membrangebundener Acetylcholinesterase im Tectum opticum der Rotfeder (Scardinius erythrophthalmus).