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. 2018 Oct 10;11:367. doi: 10.3389/fnmol.2018.00367

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Copyright © 2018 Garcia-Pradas, Gleiser, Wizenmann, Wolburg and Mack.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) 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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Tight junctions in loose wrap myelin in freeze fracture and ultrathin section electron micrographs of the retinal NFL. Tight junction strands (arrows) do not run parallel to the axon in varying distances and patterns, and between wrapping layers (a,b). Tight junctional contacts between lamellae could be verified in sections (c). The top panel shows overviews, the square frames indicate areas shown at higher magnifications in the bottom panel. V, vitreous humor; MC, Müller cell endfeet; Ax, Axon. Scale bars as indicated.