The anchoring fibrils are primarily aggregates of type VII collagen.
The proximal end inserts into the basal lamina, & the distal end is integrated into the fibrous network of the dermis.
Many of the anchoring fibrils inserted their distal ends into electron-dense amorphous-appearing structures completely independent of lamina densa, known anchoring plaques . ( type IV collagen primarily )
In the papillary dermis, oxytalan fibers insert into the basal lamina perpendicular to the basement membrane & extend into the dermis, where they merge with elaunin fibers to form a plexus parallel to the axis of DEJ, where they appear to be continuous with elastic fibers present deep within the reticular dermis.
From this distribution of this structure, we can appreciate that DEJ provides a continuous series of attachment among the major connecting tissue component of the reticular dermis & internal cytoskeletons of the basal cells.