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. 2016 Feb 22;10:16. doi: 10.3389/fnana.2016.00016

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Copyright © 2016 Steinemann, Galm, Chip, Nitsch and Maly.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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High magnification of immunocytochemistry of choroid plexus in the fourth ventricle on sagittal cryosections of adult mouse brain. Immunoreactivity for claudin-5 (A) is only present in blood vessels, in intracerebral vessels as well as in an occasional intraparenchymal vessel of the choroid plexus. Claudin-3 (B) is restricted to the epithelium of choroid plexus and claudin-2 (C) is in the epithelium of the choroid plexus and the ependyma. Green arrow choroid plexus epithelial cell, red arrow endothelium of blood vessels, black arrow ependyma. Scale bar = 50 μm in (A) applies also for (B,C).