Movie
3: FIB-SEM of part of a S1 acinus with nuclear invaginations and tunnels. FIB-SEM
was collected on the S1 acinus for a final voxel dimension of 4 nm3.
The left and right most cells each have deep nuclear invaginations (NR type
II). A primary cilium is observed at the beginning of the dataset on the apical
surface of the central cell. The central displays both nuclear invaginations
and cytoskeletal filaments transversing the nucleus within a tunnel.