Zinc accumulation in the telencephalon of lizards.
The zinc concentration in the brains of two species of lizard was determined by atomic-absorption spectrophotometry. The zinc concentration was found to be highest in the telencephalon of Lacerta galloti (21.1 micrograms/g fresh weight) and Podarcis hispanica (16.77 +/- 0.8 micrograms/g) while the mesencephalon and brain stem exhibited lower zinc concentrations, i.e., 7.0 micrograms/g in Lacerta galloti and 6.08 +/- 0.4 micrograms/g in Podarcis hispanica. This high telencephalic concentration of zinc is paralleled by intense and well-defined Timm reactivity used for demonstrating the presence of zinc-containing boutons at the light-microscope level. Volumetric-densitometric studies of these Timm-reactive zones were performed using serial transverse sections of the same lizard brains.
D000818:Animals; D001933:Brain Stem / Q000032:analysis; D008116:Lizards / Q000378:metabolism*; D008636:Mesencephalon / Q000032:analysis; D013054:Spectrophotometry, Atomic; D013687:Telencephalon / Q000032:analysis*; D015032:Zinc / Q000032:analysis*
D015032:Zinc