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Mushroom Body Evolution - Figure 7 |
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Figure 7: Internal organization of the mushroom bodies are similar across taxa I. A-C. Cross sections of the vertical lobe of the honey bee, Apis mellifera. A: staining with an antiserum against gastrin cholecystokinin. B. Staining of an adjacent section with an antiserum against FMRFamide. C. Superimposition of A, B. to show discrete immunoreactive strata, some of which contain both epitopes are shown purple (arrowed). Upper arrows indicate bundles of Kenyon cell axons leaving the calyces, and show that it is the Kenyon cells that provide immunoreactive strata in the lobes. D, E. In the cockroach, the mushroom body lobes are made up of Kenyon cell axons arranged as alternating pale and dark laminae. D shows an oblique section of the medial lobe. E shows the tips of the medial lobes at the mid-line. F-G Subdivisions also longitudinally divide the Drosophila mushroom body, as shown by different enhancer trap lines. F. Expression in enhancer trap line c772. G. Expression in enhancer trap line 702c. H False color superimposition of J, K reveals two narrower strata (arrowed in J, K, respectively) intervening between the broader subdivisions. Scale bar in A (also for B, C) = 100 µm. Scale bar in F-H = 10 µm.
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