Fig. 5.

Nearest-neighbor CD distances for descending and ascending segments of loops of Henle from a single secondary CD cluster determined at fractionated axial lengths (means ± SE; N = 42 loops). A: DTLs are farthest away from CDs at the OM-IM boundary, where they lie in the intercluster region, and gradually approach CDs at deeper levels. B: ATLs ascend in relatively close contact with CDs for ∼38% of their length immediately after the bend (the fraction lying between 0.625 to 1 on the abscissa) before moving away from CDs. Points labeled with common numerals are not significantly different from each other.