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Interstitial nodal spaces associated with a single collecting duct (CD) in a transverse section from ∼400 μm below the OM-IM boundary. One nodal space is outlined (white). A single aquaporin-1-negative descending thin limb (AQP1-negative DTL) marked with an asterisk was identified with α-B crystallin. A descending vas rectum (DVR) merging into an ascending vasa recta (AVR) is marked with the arrow. Scale bar = 10 μm.
